Bilateral Distal Clavicle Osteochondromas in Langer-Giedion Syndrome Leading to Subacromial Impingement

CASE: A 21-year-old woman with Langer-Giedion syndrome with insidious onset chronic bilateral shoulder pain exacerbated with overhead activity. Imaging obtained was consistent with distal clavicle osteochondromas with mass effect onto the superior rotator cuff. Staged bilateral open resection was performed with resolution of symptoms without recurrence. CONCLUSION: Langer-Giedion syndrome characteristically includes multiple exostoses. These are rarely found in the lateral clavicle, but when present can become symptomatic impinging upon the underlying supraspinatus and causing inflammation of the subacromial bursa due to extrinsic mechanical irritation. This is the first case report to discuss symptomatic bilateral lesions with successful treatment through open resection.