Papers - MORITA Yudai
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Yokoe T., Yang F., Tajima T., Yamaguchi N., Morita Y., Chosa E.
Foot and Ankle Surgery 31 ( 1 ) 20 - 24 2025.1
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Foot and Ankle Surgery
Background: This study aimed to investigate ankle syndesmosis in healthy subjects under non-weight bearing (NWB) and weight bearing (WB) conditions using two US methods. Methods: The anterior tibiofibular clear space (ATFCS) was measured in healthy subjects in NWB and WB conditions using two US procedures. Method 1 measured 10 mm above the ankle joint and Method 2 measured 30° from the line of 10 mm above the ankle joint. Results: A total of 60 ankles from 30 subjects (male/female, 15/15) were included. There was a significant difference in the ATFCS between the two US methods (p < 0.001), and Method 2 was better at detecting the change in diastasis from NWB to WB conditions. The ATFCS was significantly greater on WB than on NWB, irrespective of the US method. Conclusions: Method 2 was better at detecting diastasis of the syndesmosis from NWB to WB conditions. The influence of WB needs to be considered when evaluating syndesmosis using US. Level of evidence: Cross-sectional cohort study; Level of evidence, Ⅳ
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Morita Y., Tajima T., Yamaguchi N., Yokoe T., Nagasawa M., Ota T., Ouchi K., Chosa E.
Scientific Reports 14 ( 1 ) 6192 2024.12
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Scientific Reports
Posterior tibial translation (PTT) after double-bundle posterior cruciate ligament (PCL) reconstruction has sometimes occurred. Purpose of this study is to identify the risk factors for postoperative PTT after double-bundle PCL reconstruction with a hamstring autograft. Comparing the results of bilateral gravity sag view (GSV) at 12 months after surgery, over 5-mm PTT was defined as ‘failure’ in this study. Of 26 isolated PCL reconstruction cases, over 5-mm PTT was seen in 7 cases (group F: 9.57 ± 1.28 mm), and 19 cases had less than 5 mm (group G: 2.84 ± 1.29 mm). Age, sex, body mass index (BMI), preoperative GSV, posterior slope angle of the tibia, anterolateral bundle (ALB) and posteromedial bundle (PMB) graft diameters, and tibial tunnel diameter were evaluated. The two groups were compared with the 2 × 2 chi-squared test, the Mann Whitney U-test, and Spearman’s rank correlation coefficient. Multivariate logistic regression analysis was also performed to determine the risk factor. Statistical significance was indicated as p < 0.01 for correlation with postoperative PTT, and as p < 0.05 for all other comparisons. Mean age (group G 31.8 ± 12.5 vs group F 34.9 ± 15.9 years), sex (male/female: 15/4 vs 3/4), BMI (25.6 ± 4.6 vs 24.9 ± 3.9 kg/m<sup>2</sup>), preoperative GSV (11.3 ± 2.2 vs 11.6 ± 2.9 mm), PMB diameter (5.37 ± 0.33 vs 5.36 ± 0.48 mm), and tibial tunnel diameter (9.32 ± 0.58 vs 9.29 ± 0.49 mm) showed no significant differences. ALB diameter was significantly greater in group G (7.0 ± 0.5 mm) than in group F (6.5 ± 0.29 mm; p = 0.022). There was also a significant difference in posterior tibial slope angle (group G 9.19 ± 1.94 vs group F 6.54 ± 1.45, p = 0.004). On Spearman rank correlation coefficient analysis, ALB diameter GSV (correlation coefficient: − 0.561, p = 0.003) and posterior tibial slope angle (correlation coefficient: − 0.533, p = 0.005) showed a significant correlation with postoperative PTT. Multivariate logistic regression analysis showed that ALB diameter (OR 19.028; 95% CI 1.082–334.6; p = 0.044) and posterior slope angle of tibia (OR 3.081; 95% CI 1.109–8.556; p = 0.031) were independently associated with postoperative PTT, respectively. In double-bundle PCL reconstruction with hamstring, smaller ALB graft diameter and lower (flatted) tibial slope angle were considered risk factors for postoperative PTT.
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Direct repair of the chronic ochronotic Achilles tendon rupture: a case report Reviewed
Yokoe T., Nagasawa M., Tajima T., Yamaguchi N., Ota T., Morita Y., Chosa E.
BMC Musculoskeletal Disorders 25 ( 1 ) 843 2024.12
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：BMC Musculoskeletal Disorders
Background: Alkaptonuria (AKU) is a rare hereditary disease. Ochronotic arthropathy, tendinopathy, and osteopenia/osteoporosis are generally musculoskeletal manifestations in patients with AKU. Because of the ochronotic tendinopathy and osteopenia, the surgical strategy for chronic ochronotic Achilles tendon rupture may be challenging. No studies have reported the surgical treatment of chronic Achilles tendon rupture in patients with AKU. Case presentation: We report a case of AKU that required surgical treatment for chronic Achilles tendon rupture. A 60-year-old woman was referred to our department for the assessment of left hindfoot pain that persisted for more than nine months after an ankle sprain. Three years prior to the first presentation to our hospital, she was diagnosed with AKU due to pigmented hip cartilage at the time of total hip arthroplasty. The patient was diagnosed as chronic Achilles tendon rupture based on the results of physical examination and magnetic resonance imaging (MRI). The MRI showed enlarged scar tissue of the Achilles tendon with an intrasubstance high signal intensity. We performed resection of the central part of the scar tissue (total length, 24 mm) followed by direct repair using the proximal and distal stumps of the scar tissue. The MRI at 12months after surgery showed continuity of the repaired Achilles tendon. At 18 months after surgery, the Achilles Tendon Total Rupture Score improved from 22 points preoperatively to 84 points postoperatively. The foot and ankle outcome score also improved. Conclusions: We reported a case of AKU with chronic Achilles tendon rupture in which direct repair using scar tissue between the tendon stumps was effective. Careful selection of the surgical procedure for the treatment of chronic ochronotic Achilles tendon rupture is recommended because of concomitant ochronotic tendinopathy and osteopenia/osteoporosis.
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リファンピシン使用によりステロイド作用が減弱し治療に難渋した手関節非結核性抗酸菌症の1例 Reviewed
松永 美穂, 大田 智美, 田島 卓也, 山口 奈美, 長澤 誠, 森田 雄大, 横江 琢示, 帖佐 悦男
整形外科と災害外科 73 ( 3 ) 602 - 605 2024.9
Authorship：Lead author, Last author, Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：西日本整形・災害外科学会
【はじめに】ステロイド薬は他薬との薬物相互作用が比較的少なく汎用されるが，抗結核薬のリファンピシン（以下RFP）との相互作用はあまり知られていない．ネフローゼ症候群加療中に非結核性抗酸菌症（以下NTM）を合併し，ステロイドとRFPの併用で原疾患およびNTMの治療に難渋した1例を経験した．【症例】41歳男性，21歳時にネフローゼ症候群と診断され，ステロイドを内服中に手関節掌背側の腫脹を認め，滑膜切除術後に非結核性抗酸菌性滑膜炎の診断となった．RFPを含む抗結核薬3剤を開始したところ，ネフローゼ症候群が悪化しステロイドを増量，尿蛋白は改善するも手関節腫脹が再発し，2回目の滑膜切除術施行後，高気圧酸素療法で感染は鎮静化した．【考察】NTMにはRFPが汎用されるが，ステロイドとの相互作用により治療に難渋することがある．薬物の相互作用を十分に熟知し，NTMの治療にあたる必要がある．
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Differences in Retromalleolar Fibular Groove Morphology According to Level of Axial Computed Tomography Scans Reviewed
Takuji Yokoe, Takuya Tajima, Koki Ouchi, Nami Yamaguchi, Yudai Morita, and Etsuo Chosa
The Orthopaedic Journal of Sports Medicine 12 ( 3 ) 2024.3
Language：English Publishing type：Research paper (scientific journal)
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Screening of Undiagnosed Increased Lateral Ankle Laxity Using Stress Ultrasonography Reviewed
Yokoe T., Tajima T., Chosa E., Yamaguchi N., Morita Y.
Orthopaedic Journal of Sports Medicine 12 ( 4 ) 23259671241235162 2024.3
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Orthopaedic Journal of Sports Medicine
Background: Some patients with lateral ankle sprain (LAS) will experience chronic lateral ankle instability (CLAI). However, not all of those with residual increased lateral ankle laxity (ILAL) become symptomatic. There is a lack of evidence regarding the prevalence of undiagnosed ILAL in the general population. Purpose: To evaluate the prevalence of undiagnosed ILAL with the use of stress ultrasonography (US) and to investigate the percentage of ankle sprain copers (ASCs) with ILAL. Study Design: Cross-sectional study; Level of evidence, 3. Methods: The anterior talofibular ligament (ATFL) lengths in college students without diagnosis of CLAI were measured consecutively in stress and nonstress positions. The ATFL ratio was calculated as an indicator of lateral ankle laxity according to a previously reported method. The manual anterior drawer test was also performed. The Cumberland Ankle Instability Tool (CAIT) and Ankle Instability Instrument (AII) were used to assess subjective impairments related to CLAI. The correlation between the ATFL ratio and CAIT score was evaluated. Results: A total of 207 ankles from 106 participants (mean age, 23.9 ± 2.2 years; male/female, 64/42) were included. Overall, 38 participants (35.8%; 50 ankles [24.2%]) were classified as having undiagnosed ILAL. Of the ankles with no history of LAS, 8% showed ILAL. Overall, 53 participants (50%) had a history of LAS and were all classified as ASCs. Of the 82 ankles from these ASCs, 40 (48.8%) were regarded as having undiagnosed ILAL. There was no correlation between the ATFL ratio and CAIT scores (r = -0.09, P =.414). Conclusion: The prevalence of undiagnosed ILAL by stress US screening was approximately one-third in young adults. In this study, 48.8% of the ankles from ASCs showed ILAL.
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Yokoe T., Tajima T., Yamaguchi N., Morita Y., Chosa E.
Journal of Orthopaedic Science 28 ( 6 ) 1543 - 1547 2023.11
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Orthopaedic Science
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Remnant-Preserved Single-Bundle Anterior Cruciate Ligament Augmentation in Multi-ligamentous Knee Reconstruction. Reviewed
Tajima T, Yamaguchi N, Morita Y, Yokoe T, Nagasawa M, Ota T, Kawagoe S, Nakamura Y, Chosa E.
J Knee Surg 36 ( 10 ) 1095 - 1101 2023.10
Language：English Publishing type：Research paper (scientific journal)
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第2趾DIP関節脱臼に対する観血的整復術後の早期スポーツ復帰の一例
川越 亮, 田島 卓也, 山口 奈美, 大田 智美, 長澤 誠, 森田 雄大, 横江 琢示, 帖佐 悦男
整形外科と災害外科 72 ( 3 ) 485 - 487 2023.9
Authorship：Lead author, Last author, Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：西日本整形・災害外科学会
【はじめに】観血的整復術を必要とした第2趾のDIP関節脱臼の1例を経験した．【症例】16歳男性．空手中に受傷．第2趾DIP関節脱臼で徒手整復を行ったが整復不能であったため，観血的整復術を行った．整復阻害因子は長趾屈筋腱であり，蹠側板の嵌頓は認めなかった．術後早期の競技復帰希望があったため母趾とのbuddy tapingを指示し復帰とした．術後6か月が経過し特に問題なく競技継続している．【考察】DIP関節脱臼の整復阻害因子は蹠側板や長趾屈筋腱の報告があり，本症例では長趾屈筋腱であった．また，術後のスポーツ復帰について，競技によっては症状次第で早期復帰が見込めると考えられた．
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Risk factors associated with throwing injuries in young baseball players
Nagasawa Makoto, Tajima Takuya, Kawagoe Shuichi, Yamaguchi Nami, Morita Yudai, Yokoe Takuji, Ohta Tomomi, Izumi Toshihiko, Ishida Yasuyuki, Chosa Etsuo
Journal of Shoulder and Elbow Surgery 32 ( 8 ) 1673 - 1680 2023.8
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
Background
Few studies have retrospectively analyzed the relationship between joint range of motion (ROM) and muscle flexibility and shoulder and elbow throwing injuries in a large number of elementary school baseball players. The purpose of this study was to retrospectively identify the physical factors related to shoulder and elbow throwing injuries in younger baseball players.
Methods
A total of 2466 younger baseball players belonging to our Prefecture Rubber Baseball Federation who participated in medical check-ups from 2016 to 2019 were analyzed. Players completed a questionnaire and had a medical check-up that included a physical examination and ultrasonography. ROM (internal rotation [IR] angle and external rotation angle) of the shoulder and hip and the finger-to-floor distance and heel-to-buttock distance were measured. The straight leg raise was also performed. The results of two groups (normal group and injury group) were compared using the χ2 test, Mann-Whitney U test, and Student t test. Stepwise forward logistic regression models were developed to identify risk factors.
Results
On univariate analysis, nine of the 13 evaluated items showed significant decreases in ROM and muscle flexibility in the injury group. On multiple logistic regression analysis, grade, finger-to-floor distance, IR angle of the dominant side shoulder, and IR angle of the nondominant side hip were significantly associated with the occurrence of throwing injuries. Decreased total shoulder angle was observed not only on the dominant side but also on the nondominant side in the injury group.
Conclusion
Decreased ROM and muscle flexibility were risk factors for baseball-related throwing injuries in elementary school baseball players. To prevent shoulder and elbow throwing injuries, players, coaches, medical staff, and parents need to be aware of these findings. -
Ureter position and risk of ureteral injury during lateral lumbar interbody fusion Reviewed
Makoto Nagasawa,MD,Takuya Tajima,MD,PhD,Shuichi Kawagoe, MD,Nami Yamaguchi,MD,PhD, Yudai Morita,MD,Takuji Yokoe, MD,Tomomi Ota,MD,Toshihiko Izumi, MD, PhD,Yasuyuki Ishida, MD,Etsuo Chosa,MD,PhD
Journal of Clinical Medicine 32 ( 8 ) 1673 - 1680 2023.5
Language：English Publishing type：Research paper (bulletin of university, research institution) Publisher：Elsevier
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Yokoe T., Tajima T., Yamaguchi N., Morita Y., Chosa E.
Knee Surgery Sports Traumatology Arthroscopy 31 ( 5 ) 1994 - 2000 2023.5
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Knee Surgery Sports Traumatology Arthroscopy
Purpose: This study aimed to evaluate the relationship between generalized joint laxity (GJL) and stress ultrasonographic (US) findings of the anterior talofibular ligament (ATFL) of healthy young men. Methods: The ATFL lengths of healthy young men were consecutively measured in the stress and nonstress positions. The ATFL ratio was calculated as an indicator of lateral ankle laxity. GJL was evaluated using the Beighton score (BS), and a BS of ≥ 5 was considered GJL. The manual anterior drawer test (ADT) was also performed. The results of stress US and ADT were compared between subjects with and without GJL, and the correlation between GJL and US findings was examined. Results: A total of 13 subjects with GJL and 95 without GJL were included in the study. The mean BSs in the GJL and no-GJL groups were 5.9 ± 0.9 and 1.1 ± 1.3, respectively (p < 0.0001). The GJL group showed a higher grade of ADT than the no-GJL group (p < 0.0001). Significant differences were found in the stress ATFL length (23.6 ± 1.8 mm vs. 21.7 ± 1.8 mm, p = 0.002) and ATFL ratio (1.15 ± 0.06 vs. 1.07 ± 0.03, p < 0.0001) between the GJL and no-GJL groups. Spearman’s correlation coefficients showed a moderate correlation between the BS and ATFL ratio (r = 0.45, p < 0.0001). Conclusion: The present study showed significant differences in the ATFL ratio and stress ATFL length between young men with and without GJL. The BS was moderately correlated with the lateral ankle laxity in this population. Level of evidence: Level IV.
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Risk factors of failure results after double-bundle reconstruction with autogenous hamstring grafts for isolated posterior cruciate ligament rupture cases Reviewed
Yudai Morita,Takuya Tajima,Nami Yamaguchi,Takuji Yokoe,Makoto Nagasawa,Tomomi Ota,Kouki Ouchi,Etsuo Chosa
Scientific reports 6192 2023.3
Language：English Publishing type：Research paper (bulletin of university, research institution) Publisher：nature portfolio
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Risk factors of failure results after double-bundle reconstruction with autogenous hamstring grafts for isolated posterior cruciate ligament rupture cases Reviewed
Yudai Morita,Takuya Tajima,Nami Yamaguchi,Takuji Yokoe,Makoto Nagasawa,Tomomi Ota,Kouki Ouchi,Etsuo Chosa
Scientific reports 6192 2023.3
Language：English Publishing type：Research paper (bulletin of university, research institution)
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Yokoe T., Tajima T., Yamaguchi N., Morita Y., Chosa E.
Medicina Lithuania 59 ( 3 ) 2023.3
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Medicina Lithuania
Muscle herniation of the lower extremity, such as tibialis anterior muscle herniation (TAMH), is not a rare cause of leg pain in athletes. However, a few studies have reported surgical treatment for TAMH, and the optimal surgical procedure remains controversial. Fasciotomy was reported to be effective for patients with TAMH. However, this procedure would be associated with a risk of intraoperative injury to the superficial peroneal nerve (SPN), although no previous literature has reported this complication. This case report aimed to report a case of bilateral TAMHs in which a traumatic neuroma of the SPN developed after fasciotomy. A 16-year-old baseball player presented with painful swelling lesions of the bilateral lower extremities (1 lesion on the right, 3 lesions on the left) after sports activities. An ultrasonographic evaluation showed swelling lesions of the anterolateral parts of the bilateral lower extremities in the standing position after dashing, while these lesions were not detected in the supine position. A fasciotomy of the crural fascia was performed after conservative treatment failed. Several days after surgery, the patient presented with weakened touch sensation over the dorsal area of the left foot. At the three-month follow-up examination, a swelling lesion with hard elasticity was identified. The palpation of this lesion caused a radiating sensation in the area supplied by the SPN. He was able to return to playing baseball six months after surgery. The patient was asymptomatic without palpation of the traumatic neuroma of the SPN at the latest follow-up examination. In conclusion, the present case report suggests that orthopedic surgeons need to consider the risk of iatrogenic injury to the SPN during fasciotomy for the treatment of TAMHs. However, there may be a risk of injuring the SPN because of the many variants of the course of the SPN within the compartment of the lower extremities.
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A Traumatic Neuroma Formation Following Fasciotomy for the Treatment of Tibialis Anterior Muscle Herniation:A Case Report Reviewed
Takuji Yokoe,Takuya Tajima,Nami Yamaguchi,Yudai Morita and Etsuo Chosa
medicina 2023.2
Language：English Publishing type：Research paper (scientific journal) Publisher：MDPI
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Risk Factors of Loss of Knee Range of Motion after Primary Anterior Cruciate Ligament Reconstruction following Preoperative Recovery of Knee Range of Motion Reviewed
Takuji Yokoe, Takuya Tajima, Nami Yamaguchi, Yudai Morita, Etsuo Chosa
The Journal of Knee Surgery 2022.12
Language：English Publishing type：Research paper (scientific journal) Publisher：Thieme
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Yokoe T., Tajima T., Kawagoe S., Yamaguchi N., Morita Y., Chosa E.
BMC Musculoskeletal Disorders 23 ( 1 ) 887 2022.12
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：BMC Musculoskeletal Disorders
Background: A number of studies have evaluated risk factors for lateral ankle sprain (LAS) or chronic lateral ankle instability (CLAI). However, the definitive risk factors for LAS or CLAI remain controversial. The purpose of this study was to evaluate whether the contralateral healthy ankles of subjects with ipsilateral mechanical lateral ankle laxity (group I) show greater lateral ankle laxity in comparison to the healthy ankles of bilateral healthy controls (group B). Methods: From March 2020, anterior talofibular ligament (ATFL) lengths of young adult volunteers were cross-sectionally measured in non-stress and stress positions using a previously reported stress ultrasonography (US) procedure. The ATFL ratio (the ratio of stress ATFL/non-stress ATFL length) was calculated as an indicator of lateral ankle laxity. The manual anterior drawer test (ADT) was also performed. The US findings of healthy ankles from groups I and B were compared. Results: A total of 154 subjects in group B (mean age, 24.5 ± 2.8 years; male/female, 84/70) and 40 subjects in group I (mean age, 24.4 ± 2.3 years; male/female, 26/14) were included in the study. There was no significant difference in the ADT between the groups. There were no significant differences in the non-stress ATFL length (19.4 ± 1.8 vs. 19.3 ± 1.9, p = 0.84), stress ATFL length (20.8 ± 1.8 vs. 20.9 ± 1.9, p = 0.66), length change (1.5 ± 0.6 vs. 1.6 ± 0.6, p = 0.12) and ATFL ratio (1.08 ± 0.03 vs. 1.08 ± 0.03, p = 0.13) between the groups. Conclusion: No significant difference was detected between the contralateral healthy ankles of subjects with ipsilateral mechanical lateral ankle laxity and those of bilateral healthy controls.
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The Results of Orthopaedic Medical Examinations in Adolescent Amateur Weightlifters Reviewed
Yokoe T., Tajima T., Yamaguchi N., Nagasawa M., Morita Y., Chosa E.
International Journal of Environmental Research and Public Health 19 ( 21 ) 2022.11
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：International Journal of Environmental Research and Public Health
Few studies have reported injuries and physical characteristics in adolescent weightlifters. The purpose of this study was to report the results of orthopaedic medical examinations in adolescent amateur weightlifters that were performed cross-sectionally from 2012 to 2019. The orthopaedic medical examination included physical examinations, generalized joint laxity, muscle and joint tightness, static alignment, muscle volume of the lower extremities, and medial longitudinal arch of the foot (the height from the tip of the navicular tubercle to the ground surface). A questionnaire survey regarding pain in the spine and lower extremities was also performed. A total of 99 adolescent weightlifters were included (male/female, 71/28; mean age, 16.2 ± 0.2 years). A total of 9.1% had received orthopaedic treatments, with spine injuries being the most prevalent. Of those who had not received orthopaedic treatments, 31.1% had pain in the spine or lower extremities (for >4 weeks). There were no significant gender differences in the incidence of pain or positive findings of physical examinations. Female weightlifters had a more reduced dorsiflexion of the ankle joint than male weightlifters (p = 0.02). Male weightlifters had a lower flexibility of the quadriceps than female weightlifters. The results of orthopaedic medical examinations in this study may help clinicians and young weightlifters to prevent injuries in competitive weightlifting.
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Yokoe T., Tajima T., Yamaguchi N., Morita Y., Chosa E.
Medicina Lithuania 58 ( 11 ) 2022.11
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Medicina Lithuania
Osteochondral lesion (OCL) of the patellofemoral (PF) joint is not an uncommon cause of knee pain, and surgery is needed when conservative treatment fails. However, there is a lack of evidence regarding the optimal surgical treatment for OCL of the PF joint. Fixation of OCLs using autogenous osteochondral grafts has been reported to be effective for OCL of the knee. However, in this surgical technique, the biomechanical strength of osteochondral grafts may not be sufficient in patients with open physes due to the specific quality of the cartilage and subchondral bone given their age. There is a lack of studies reporting fixation of the OCL located in the PF joint using autogenous osteochondral grafts. We herein report a case of OCL of the femoral intercondylar groove where autogenous osteochondral grafts augmented with bioabsorbable pins were used to fix the lesion in a 14-year-old patient with open physes. Preoperative MRI revealed a completely detached OCL of the intercondylar groove (36 mm × 20 mm). Although a total of four osteochondral grafts were harvested from the non-weightbearing area of the lateral femoral condyle, cartilage detached from one of the grafts. The quality of the osteochondral grafts was considered to be insufficient for stabilization of the OCL; thus, two bioabsorbable pins were additionally inserted following fixation of the lesion using three osteochondral grafts. After two years of follow-up, postoperative functional scores were favorable without knee pain. The present case suggests that fixation of the OCL using autogenous osteochondral grafts may not be appropriate for young patients with open physes.
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The Results of Orthopaedic Medical Examinations in Adolescent Amateur Weightlifters Reviewed
Takuji Yokoe, Takuya Tajima, Nami Yamaguchi, Makoto Nagasawa, Yudai Morita, Etsuo Chosa
International Journal of Environmental Research and Public Health 19 ( 21 ) 13947 2022.10
Language：English Publishing type：Research paper (scientific journal) Publisher：MDPI
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The Results of Orthopaedic Medical Examinations in Adolescent Amateur Weightlifters Reviewed
Takuji Yokoe,Takuya Tajima,Nami Yamaguchi,Makoto Nagasawa,Yudai Morita and Etsuo Chosa
International Journal of Environmental Research and Public Health 19 13947 2022.10
Language：English Publishing type：Research paper (scientific journal) Publisher：International Journal fo Environmental Research and Public Health
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Fixation of an Osteochondral Lesion of the Femoral Intercondylar Groove Using Autogenous Osteochondral Grafts and Bioabsorbabale Pins in a Patient with Open Physes:A Case Report Reviewed
Takuji Yokoe,Takuya Tajima,Nami Yamaguchi,Yudai Morita and Etsuo Chosa
medicina 2022.10
Language：English Publishing type：Research paper (scientific journal) Publisher：MDPI
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足部びまん性色素性絨毛結節性滑膜炎に対し，関節鏡下腫瘍切除術を施行した一例 Reviewed
外山 宗樹,横江 琢示,田島 卓也,山口 奈美,大田 智美,長澤 誠,森田 雄大,川越 秀一,帖佐 悦男
整形外科と災害外科 71 ( 4 ) 725 - 729 2022.9
Language：Japanese Publishing type：Research paper (other academic) Publisher：西日本整形・災害外科学会
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健常者スポーツ，パラスポーツの相互理解を目指して‐合同メディカルチェックの試み- Reviewed
喜多恒允，田島卓也，横江琢示，森田雄大，長澤誠，山口奈美，帖佐悦男
日本臨床スポーツ医学会誌 30 ( 3 ) 695 - 702 2022.8
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：日本臨床スポーツ医学会
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Remnant-Rreserved Single-Bundle Anterior Cruciate Ligament Augmentation in Multi-ligamentous Knee Reconstruction Reviewed
Takuya Tajima,MD, PhD NamiYamaguchi,MD,PhD Yudai Morita,MD Takuji Yokoe,MD Makotot Nagasawa,MD Tomomi Ota,MD Shuichi Kawagoe,MD Yoshihiro Nakamura, MD Etsuo Chosa,MD,PhD
The Journal of Knee Surgery 2022.6
Language：English Publishing type：Research paper (scientific journal) Publisher：Thieme Medical Publishers,Inc.
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A longer duration from injury to surgery is associated with preoperative deterioration of an isolated meniscal tear in patients aged 40 years or older Reviewed
Takuji Yokoe, Takuya Tajima, Nami Yamaguchi, Yudai Morita, Etsuo Chosa
Journal of Orthopaedic Surgery (Hong Kong) 30 ( 2 ) 10225536221101692 2022.5
Language：English Publishing type：Research paper (scientific journal) Publisher：SAGE Publishing
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Yokoe T., Tajima T., Yamaguchi N., Morita Y., Chosa E.
Journal of Knee Surgery 36 ( 13 ) 1365 - 1373 2022.5
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Knee Surgery
The loss of knee range of motion (ROM) is not an uncommon complication after anterior cruciate ligament reconstruction (ACLR). However, the risk factors of loss of knee ROM remain debatable. The purpose of this study was to evaluate the incidence and risk factors of loss of knee ROM at 12 months after primary ACLR performed after regaining full knee ROM preoperatively. Consecutive patients who underwent primary ACLR after regaining full ROM between January 2014 and January 2020 were retrospectively reviewed. Patients who received a surgical arthrolysis within 12 months after ACLR or those who had a loss of knee ROM at 12 months postoperatively were defined as the loss of ROM group. Possible risk factors of loss of knee ROM, including patient demographic, preoperative, surgical, and postoperative factors, were assessed. The notch wide index and radiographic parameters of the tibial spines; medial tibial spine height/tibial length (TL), lateral tibial spine height (LTSH)/TL, and tibial spine width (TSW)/TL, were also assessed. A total of 141 patients (141 knees) were included (mean age, 25.8 ± 11.4 years; male/female, 56/85). Of the 141 patients, three received surgical arthrolysis within 12 months, and 23 had a loss of knee ROM at 12 months after ACLR. On comparing patients with and without loss of knee ROM, significant differences were found in the age (p = 0.04), LTSH/TL (p = 0.02), and TSW/TL (p = 0.02). A multivariate regression analysis showed that the age (odds ratio [OR]; 1.05, 95% confidence interval [CI]: 1.01-1.09, p = 0.02), LTSH/TL (OR: 1.44, 95% CI: 1.01-2.1, p = 0.04), and TSW/TL (OR: 0.79, 95% CI: 0.65-0.97, p = 0.02) were identified as significant independent risk predictors of loss of knee ROM. This study showed that the incidence of loss of knee ROM at 12 months after primary ACLR was 18.4% (26/141). An older age, a higher LTSH/TL, and a smaller TSW/TL may be associated with loss of knee ROM at 12 months after ACLR.
DOI： 10.1055/a-1934-0776
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Yokoe T., Tajima T., Yamaguchi N., Morita Y., Chosa E.
Journal of Orthopaedic Surgery 30 ( 2 ) 2022.5
Authorship：Lead author, Last author, Corresponding author Publishing type：Research paper (scientific journal) Publisher：Journal of Orthopaedic Surgery
Purpose: To evaluate the preoperative deterioration of an isolated meniscal tear in patients aged 40 years or older, and whether time from injury to surgery is associated with worsening of a meniscal tear. Methods: Patients aged 40 years or older who underwent arthroscopic surgery for isolated meniscal tear between 2014 and 2019 were retrospectively reviewed. The diagnostic magnetic resonance imaging (MRI) findings and arthroscopic findings were compared to evaluate the deterioration of meniscal tears. Predictors of the development of meniscal tears; patient demographic factors, duration from injury to surgery (injury to MRI and MRI to surgery), and image findings were assessed. Results: A total of 58 patients (58 knees) were included (mean age, 55.9 ± 8.5 years; male/female, 31/27). An isolated meniscal tear deteriorated in 28 (48.3%). Compared patients with and without deteriorated meniscal tear, significant differences were found in the MRI grade of meniscal tear (p = 0.03), duration from injury to MRI (164.2 ± 167.9 vs 45.2 ± 48.7 days, p < 0.001), and from MRI to surgery (148.8 ± 91.1 vs 67.6 ± 56.7 days, p < 0.001). A multivariate regression analysis showed that the duration from injury to MRI (odds ratio [OR], 1.03; p < 0.001) and from MRI to surgery (OR, 1.02; p < 0.001) were independent predictors. Conclusion: Approximately 50% of isolated meniscal tears deteriorated preoperatively in patients aged 40 years or older. The duration from injury to surgery was an independent predictor of worsening of an isolated meniscal tear.
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Symptomatic discoid lateral meniscus shows a relationship between types and tear patterns, and between causes of clinical symptom onset and the age distribution Reviewed
Nami Yamaguchi, Etsuo Chosa, Takuya Tajima, Yudai Morita, Takuji Yokoe
Knee Surgery, Sports Traumatology, Arthroscopy 30 ( 4 ) 1436 - 1442 2022.4
Language：English Publishing type：Research paper (scientific journal) Publisher：European Society of Sports Traumatology, Knee Surgery and Arthroscopy
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Yokoe T., Tajima T., Yamaguchi N., Morita Y., Chosa E.
Journal of Clinical Medicine 11 ( 7 ) 2022.4
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Clinical Medicine
The Beighton score (BS) is widely used to evaluate generalized joint laxity. However, the association between the BS and lateral ankle laxity is unclear. This study compared the ultrasono-graphic (US) findings of the anterior talofibular ligament (ATFL) between high-(≥6) and low-(≤3) BS groups of healthy young women. The ATFL lengths of healthy young women were measured in the stress and nonstress positions using the previously reported technique from March 2021 to January 2022. The ATFL ratio (ratio of stress to nonstress ATFL length) was used as an indicator of lateral ankle laxity. The anterior drawer test (ADT) was performed. The correlation between the BS and US findings was also examined. A total of 20 (high-BS group) and 61 (low-BS group) subjects with a mean age of 23.8 ± 1.0 years were included. The high-BS group showed a higher grade of ADT than the low-BS group. No significant differences were found in the nonstress and stress ATFL lengths and ATFL ratio (1.10 ± 0.05 vs. 1.09 ± 0.05, p = 0.19) between the groups. No correlation was found between the BS and US findings. In conclusion, this study did not detect significant differences in the US findings of the ATFL between the high-and low-BS groups.
DOI： 10.3390/jcm11071759
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Does the contralateral healthy ankle of patient with ipsilateral mechanical lateral ankle laxity show greater lateral ankle laxith? Evaluation of the anterior talofibular ligament by stress ultrasonography Reviewed
Takuji Yokoe,Takuya Tajima,Shuichi Kawagoe,Nami Yamaguchi,Yudai Morita and Etsuo Chosa
BMC Musculoskeletal Disorders 23 ( 1 ) 887 2022
Language：English Publishing type：Research paper (scientific journal) Publisher：BMC
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Clinical and Radiographic Outcomes of Double-Bundle Anterior Cruciate Ligament Reconstruction for Asian Patients with Bone-Patellar Tendon-Bone and Gracilis Tendon Grafts: A Matched-Control Comparison
Takuya Tajima, Nami Yamaguchi, Yudai Morita, Makoto Nagasawa, Tomomi Ota, Yoshihiro Nakamura, Takuji Yokoe, Etsuo Chosa
Journal of Knee Surgery 2021.12
Publishing type：Research paper (scientific journal)
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Yokoe T., Tajima T., Yamaguchi N., Morita Y., Chosa E.
BMC Musculoskeletal Disorders 22 ( 1 ) 636 2021.12
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：BMC Musculoskeletal Disorders
Background: Lateral ankle sprain (LAS) is one of the most common musculoskeletal injuries. Numerous studies regarding LAS have been performed. However, there are few studies evaluating the current clinical practice of orthopaedic surgeons regarding LAS. The purpose of this study was to evaluate the current clinical practice of general orthopaedic surgeons in the treatment of LAS. Methods: A questionnaire survey was conducted from September 2020 to December 2020 in Miyazaki, Japan, to evaluate the clinical practice of general orthopaedic surgeons in the treatment of LAS. The survey was composed of 12 questions that were developed with consideration of the recommendations in the current clinical practice guidelines (CPGs) published by the Dutch orthopaedic society. The questions in this study were focused on the diagnosis, conservative treatment, rehabilitation, and the criteria for return to sports (RTS). Results: The survey response rate was 82.7% (129/156). Among the respondents, 95.3% did not consider the Ottawa Ankle Rules in the decision to perform plain radiography for patients. Rehabilitation following LAS was performed in 58.9% of patients. Eighty-five (65.9%) of the surgeons used only one factor as the criterion for RTS. The absence of pain was the most frequently used criterion (45.7%). No objective criteria were used for the RTS decision in athletes with LAS. Conclusions: The present study suggested that most general orthopaedic surgeons do not provide the care for patients with LAS recommended by the current CPGs. No objective criteria for the RTS decision are used for athletes with LAS.
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A case of nail-patella syndrome with osteochondral lesion of the lateral femoral condyle accompanied with anomalies of anterior horns of the menisci and lateral femoral condyle Reviewed
2021.10
Publishing type：Research paper (scientific journal)
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木戸 義隆, 田島 卓也, 山口 奈美, 長澤 誠, 大田 智美, 森田 雄大, 横江 琢示, 川越 秀一, 帖佐 悦男
整形外科と災害外科 70 ( 4 ) 703 - 706 2021.9
Authorship：Lead author, Last author, Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：西日本整形・災害外科学会
【目的】高校空手選手の貧血について調査したので報告する．【対象・方法】2012-2019年の宮崎県某高校空手部1年生68名（男子39名，女子29名）を対象とし，2015-2019年の国民体育大会宮崎県代表候補選手のうち高校1年生160名（男子114名，女子46名）と比較した．【結果】男子はHb＜13 g/dL，女子はHb＜12 g/dLを貧血とした．【結果】空手選手では30.8％（男子28.2％，女子34.5％）に貧血を認め，全例正球性貧血だった．他競技の貧血例は陸上女子選手1例だった．空手選手の貧血群と非貧血群で血清鉄，網赤血球，フェリチン，不飽和鉄結合能に有意差はなく，貧血と鉄欠乏に関連はなかった．【考察】空手部の貧血が全例正球性貧血であったことから，空手の突き動作に伴い頻回に足を踏み込む動作で足底血管にて溶血をきたしたと考えた．空手選手のメディカルサポートの際には，貧血を考慮する必要があると考えられた．
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當瀬 雅大, 大田 智美, 坂本 武郎, 田島 卓也, 山口 奈美, 長澤 誠, 森田 雄大, 横江 琢示, 川越 秀一, 帖佐 悦男, 川野 啓介
整形外科と災害外科 70 ( 4 ) 749 - 753 2021.9
Authorship：Lead author, Last author, Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：西日本整形・災害外科学会
〔はじめに〕腱鞘巨細胞腫は手指に多く発生することが知られているが，多発例の報告は稀である．上下肢3か所に多発した稀な腱鞘巨細胞腫の症例を経験したので報告する．〔症例〕45歳男性で，約4年前に左示指に釣り針が刺さった同時期より左示指，左肘，左膝の腫瘤を自覚した．MRIで3か所とも関節外にT1強調画像で等から軽度高信号，T2強調画像で低信号，造影で不均一に造影される境界明瞭な腫瘤を認めた．左膝腫瘤の切除生検を施行した結果，腱鞘巨細胞腫の診断に至った．生検と画像所見より，多発腱鞘巨細胞腫と判断し，3か所同時に腫瘍摘出術を施行し，最終診断もすべて腱鞘巨細胞腫であった．〔考察〕我々が渉猟しえた限りでは多発例は32報告で，上下肢に及ぶ2か所発生例，3病変の発生例はそれぞれ1例のみであった．本症例は上下肢に及ぶ3病変の多発例であり，稀な症例であると思われた．〔結語〕本症例は再発リスク因子が多く，今後の慎重な経過観察が必要と考える．
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Real-time action recognition system for elderly people using stereo depth camera
Zin T T, Htet Y, Akagi Y, Tamura H, Kondo K, Araki S, Chosa E
Sensors 2021.9
Publishing type：Research paper (scientific journal)
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Internal Fixation of a Lateral Inverted Osteochondral Fracture of the Talus (LIFT) Lesion Using an Innovative Surgical Approach: Inverting the Capsulo-Lateral Fibulotalocalcaneal Ligament (LFTCL)–Fibular Periosteum Complex
Yokoe T, Tajima T, Yamaguchi N, Ota T, Nagasawa M, Morita Y, Chosa E
Journal of Foot and Ankle Surgery 2021.9
Publishing type：Research paper (scientific journal)
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Yokoe T., Tajima T., Yamaguchi N., Morita Y., Chosa E.
Journal of Knee Surgery 34 ( 11 ) 1237 - 1242 2021.9
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Knee Surgery
Atopic dermatitis (AD), sometimes referred to as eczema, is a common skin disease, and skin barrier dysfunction and immunological disorders are well recognized. However, surgical wound complications after orthopaedic surgery in patients with AD have not been described. This study aimed to report four patients with AD who developed foreign body reactions to FiberWire sutures with or without surgical wound infection (SSI) after knee cruciate ligament reconstruction (CLR). The mean age was 19.8 (range, 16-25) years, and patients 1 and 3 underwent reconstructions of the posterior and anterior cruciate ligament, respectively. At a mean of 7.5 (range, 4-10) weeks postoperatively, discharge from the surgical wound at the tibial side of the fixed graft was identified. All patients were treated with continuous saline lavage and antibiotics; however, their wounds did not heal. Second-look arthroscopy and hardware removal were performed at a mean 12.2 (range, 9-15) months postoperatively. Proliferated granulation tissue surrounding the FiberWire was identified. Intraoperative wound cultures were negative in three of the four patients. Histological examination of the tissues adjacent to the FiberWire revealed a foreign body reaction. All wounds healed immediately after the second surgery. In addition to SSI, foreign body reactions are more likely to occur in patients with AD than in those without AD. Preoperative management of AD by dermatologists and consideration of appropriate suture materials are mandatory to reduce surgical wound complications after knee CLR in patients with AD.
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上下肢3ヶ所に多発した腱鞘巨細胞腫の治療経験 Reviewed
當瀬 雅大, 大田 智美, 坂本 武郎, 田島 卓也, 山口 奈美, 長澤 誠, 森田 雄大, 横江 琢示, 川越 秀一, 帖佐 悦男, 川野 啓介
整形外科と災害外科 2021.9
Publishing type：Research paper (scientific journal)
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高校空手選手における貧血調査 Reviewed
木戸 義隆, 田島 卓也, 山口 奈美, 長澤 誠, 大田 智美, 森田 雄大, 横江 琢示, 川越 秀一, 帖佐 悦男
整形外科と災害外科 2021.9
Publishing type：Research paper (scientific journal)
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The current clinical practice of general orthopaedic surgeons in the treatment of lateral ankle sprain: a questionnaire survey in Miyazaki, Japan
Yokoe T, Tajima T, Yamaguchi N, Morita Y, Chosa E
BMC Musculoskeletal Disorders 2021.7
Publishing type：Research paper (scientific journal)
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Symptomatic discoid lateral meniscus shows a relationship between types and tear patterns, and between causes of clinical symptom onset and the age distribution
Yamaguchi N, Chosa E, Tajima T, Morita Y, Yokoe T
Knee Surgery, Sports Traumatology, Arthroscopy 2021.6
Publishing type：Research paper (scientific journal)
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Yokoe T., Tajima T., Yamaguchi N., Nagasawa M., Ota T., Morita Y., Chosa E.
BMJ Open 11 ( 1 ) e042188 2021.1
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：BMJ Open
Objectives Medical examinations for adult elite athletes are performed all over the world, however, no studies in the relevant English literature have reported on orthopaedic medical examinations for young amateur athletes. The purpose of this study was to report the results of orthopaedic medical examinations of the spine and lower extremities in young amateur athletes. Methods This repeated cross-sectional study from 2014 to 2018 included a total of 323 young amateur athletes (age, 12-18 years) who were active in one of the following four sports: boxing, canoeing, weightlifting and track and field. The orthopaedic medical examination consisted of six assessments (physical examinations, the generalised joint laxity, muscle and joint tightness, static alignment and muscle volume of the lower extremities and the medial longitudinal arch of the foot). Questions regarding pain in the spine and lower extremities were also performed. Results Among 323 young amateur athletes, 17 (5.3%) had received orthopaedic treatment at the time of the medical examination, with spondylolysis being the most common cause (29.4%, 5/17). Among 306 young athletes who had not received orthopaedic treatment, 61 (19.9%) had at least one positive finding in physical examinations or had pain in the spine or lower extremities. Anterior drawer test of the ankle and Kemp test for the spine accounted for 34% and 28% of positive findings, respectively. Low back pain and knee pain accounted for 58% and 16% of pain, respectively. Conclusions The present study showed that approximately one-fifth of young amateur athletes who had not received orthopaedic treatment had pain in the spine and lower extremities and positive findings in physical examinations that may require orthopaedic treatments. In addition to the early detection of injuries, orthopaedic medical examinations for young amateur athletes provide an opportunity to educate such athletes.
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Predictors of Spondylolysis on Magnetic Resonance Imaging in Adolescent Athletes With Low Back Pain Reviewed
Yokoe T., Tajima T., Sugimura H., Kubo S., Nozaki S., Yamaguchi N., Morita Y., Chosa E.
Orthopaedic Journal of Sports Medicine 2021.1
Language：English Publishing type：Research paper (scientific journal)
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Symptomatic discoid lateral meniscus shows a relationship between types and tear patterns, and between causes of clinical symptom onset and the age distribution Reviewed
Yamaguchi N., Chosa E., Tajima T., Morita Y., Yokoe T.
Knee Surgery, Sports Traumatology, Arthroscopy 2021.1
Language：English Publishing type：Research paper (scientific journal)
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Yokoe T., Tajima T., Kawagoe S., Yamaguchi N., Morita Y., Chosa E.
Orthopaedic Journal of Sports Medicine 9 ( 11 ) 23259671211056305 2021
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Orthopaedic Journal of Sports Medicine
Background: Stress ultrasonography (US) has been shown to be a valid procedure for evaluating chronic anterior talofibular ligament (ATFL) injury. The ratio of stress/nonstress ATFL length (ATFL ratio) as measured on US is clinically useful; however, there are no published normative data concerning this ratio. Purpose: To report a normative value of the ATFL ratio on US and evaluate the relationships between sex, generalized joint laxity (GJL), and the grade of anterior drawer test (ADT). Study Design: Cross-sectional study; Level of evidence, 3. Methods: The ATFL lengths were prospectively measured in the stress and nonstress positions (manual maximal anterior drawer position) for participants with noninjured ankles from March 2020 to March 2021. GJL was defined as a Beighton score ≥4. A manual ADT was also performed. The ATFL ratio was calculated, and the relationships between sex, GJL, and ADT grade were evaluated. Results: A total of 333 ankles in 184 participants (mean age, 24.5 ± 2.7 years; range, 20-33 years) were eligible for the analysis. GJL was found in 69 ankles (20.7%). The mean ATFL ratio was 1.08 ± 0.04 (95% CI, 1.08-1.09; range, 1.01-1.24), and there was a significant difference between male (1.07 ± 0.04; 95% CI, 1.07-1.08; range, 1.02-1.23) and female (1.09 ± 0.04; 95% CI, 1.08-1.10; range, 1.01-1.24) ankles (P =.001). In male ankles, the ATFL ratio was significantly greater in participants with GJL (1.11 ± 0.06 vs 1.07 ± 0.03; P =.02) or a higher grade of ADT (grade 2 vs grade 1: 1.11 ± 0.06 vs 1.07 ± 0.03, P =.002). These findings were not observed in female ankles. Conclusion: The normative value of the ATFL ratio on stress US was 1.07 ± 0.04 in men and 1.09 ± 0.04 in women. The ATFL ratio was affected by the presence of GJL in men but not in women. These findings will be useful for future studies seeking to establish the cutoff value of the ATFL ratio for diagnosing chronic lateral ankle stability on stress US.
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コリジョンスポーツにおける至適な頸部周囲筋力と頸椎アライメントの解明：重症頭頸部外傷を予防するために Reviewed
田島卓也、山口奈美、黒木修司、森田雄大、帖佐悦男
デサントスポーツ科学 41 135 - 144 2020.9
Language：Japanese Publishing type：Research paper (scientific journal)
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Comparison of symptomatic spondylolysis in young soccer and baseball players Reviewed
Yokoe T., Tajima T., Sugimura H., Kubo S., Nozaki S., Yamaguchi N., Morita Y., Chosa E.
Journal of Orthopaedic Surgery and Research 15 ( 1 ) 378 2020.9
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Orthopaedic Surgery and Research
Background: Spondylolysis is the main cause of low back pain (LBP) in young athletes. There are few studies analyzing the difference of spondylolysis among young athletes with different sports activities. The purpose of this study was to compare the clinical factors and distribution of the lesions of spondylolysis on magnetic resonance imaging (MRI) scans in young soccer and baseball players with symptomatic spondylolysis. Methods: The medical records of 267 young athletes aged 7 to 18 years old who underwent MRI to evaluate the cause of LBP between 2017 and 2020 were retrospectively reviewed to identify patients with spondylolysis. Of the young athletes with symptomatic spondylolysis, clinical factors and MRI findings in soccer and baseball players were retrospectively evaluated. The clinical factors were age, sex, interval from onset of LBP to MRI, and side of the dominant leg in the sports field. MRI findings included number, lumbar level, and side of the lesions. Results: A total of 33 soccer players (mean age, 15.4 ± 1.4 years) and 49 baseball players (mean age, 15.4 ± 1.6 years) with symptomatic spondylolysis were enrolled. All patients were male. No significant differences were noted in age and the interval from onset of LBP to MRI between the groups. Soccer players had greater numbers of multiple (p < 0.001) and bilateral (p < 0.001) lesions than baseball players. The dominant side of the hand for pitching or batting was correlated with the contralateral-side lesions in baseball players (p = 0.001). Conclusions: The distribution of the lesions of spondylolysis differed in young soccer and baseball players. Pitching or batting with the dominant-side hand would be associated with contralateral-side lesions in baseball players. Sports-specific movements and the side of the dominant leg should be considered when treating young athletes with symptomatic spondylolysis.
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Comparison of symptomatic spondylolysis in young soccer and baseball players Reviewed
横江 琢示, 田島 卓也, 山口 奈美, 森田 雄大, 帖佐 悦男
Journal of Orthopaedic Surgery and Research 15 378 2020.9
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：BMC
Background
Spondylolysis is the main cause of low back pain (LBP) in young athletes. There are few studies analyzing the difference of spondylolysis among young athletes with different sports activities. The purpose of this study was to compare the clinical factors and distribution of the lesions of spondylolysis on magnetic resonance imaging (MRI) scans in young soccer and baseball players with symptomatic spondylolysis.
Methods
The medical records of 267 young athletes aged 7 to 18 years old who underwent MRI to evaluate the cause of LBP between 2017 and 2020 were retrospectively reviewed to identify patients with spondylolysis. Of the young athletes with symptomatic spondylolysis, clinical factors and MRI findings in soccer and baseball players were retrospectively evaluated. The clinical factors were age, sex, interval from onset of LBP to MRI, and side of the dominant leg in the sports field. MRI findings included number, lumbar level, and side of the lesions.
Results
A total of 33 soccer players (mean age, 15.4 ± 1.4 years) and 49 baseball players (mean age, 15.4 ± 1.6 years) with symptomatic spondylolysis were enrolled. All patients were male. No significant differences were noted in age and the interval from onset of LBP to MRI between the groups. Soccer players had greater numbers of multiple (p < 0.001) and bilateral (p < 0.001) lesions than baseball players. The dominant side of the hand for pitching or batting was correlated with the contralateral-side lesions in baseball players (p = 0.001).
Conclusions
The distribution of the lesions of spondylolysis differed in young soccer and baseball players. Pitching or batting with the dominant-side hand would be associated with contralateral-side lesions in baseball players. Sports-specific movements and the side of the dominant leg should be considered when treating young athletes with symptomatic spondylolysis. -
Clinical and Radiographic Outcomes of Double-Bundle Anterior Cruciate Ligament Reconstruction for Asian Patients with Bone-Patellar Tendon-Bone and Gracilis Tendon Grafts: A Matched-Control Comparison Reviewed
Takuya Tajima、Nami Yamaguchi、Yudai Morita、Makoto Nagasawa、Tomomi Ota、Yoshihiro Nakamura、Takuji Yokoe、Etsuo Chosa
The Journal of Knee Surgery 1 - 8 2020.5
Language：English Publishing type：Research paper (scientific journal)