鏡視下に確認できた上腕二頭筋長頭腱破格の1例

概要

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We report a rare case of a semi-professional baseball player who had anomaly of the long head of the biceps brachii. A 26-year-old male, who had a 17-year career of baseball felt a pain on his right shoulder in the cocking phase for throwing. Conservative treatments and no throwing for 4 weeks were not effective. Crank test and horizontal adduction test were positive. MR arthrography revealed joint side tear of rotator cuff. Arthroscopic examination revealed the long head of the biceps brachii was empty and no lesion of origin. Cord like tissues combined with deep layer of supraspinatous tendon, so we diagnosed anomaly of the long head of the biceps brachii. Debridement was performed to joint side tear of the rotator cuff. Postoperatively, there was good pain relief and he returned to baseball game. We consider anomaly of the long head of the biceps brachii caused muscle unbalance and internal impingement. This case was first reported when arthroscopic examination revealed long head of the biceps brachii was empty and no lesion of origin.
2010-08-04