Rupture of the subscapularis muscle-tendon is uncommon and difficult to diagnose clinically and graphically. Several features of this injury were illustrated by 4 cases treated in our hospital within the last year.
(1) Positive history of trauma
(2) Unreduced and intractable motion pain, especially throwing motion, associated with conservative treatment.
(3) Air CT is the best technique for showing accurate pathologic changes.
(4) Surgical treatment achieved pain relief and full recovery, allowing patents to resume sporting activites and employment in all cases.