synonyms: Bennett's lesion
Throwers Exostosis ICD-9
Throwers Exostosis Etiology / Epidemiology / Natural History
- Throwers exostosis = bony posterioinferior prominencde at the posterior insertion of the inferior glenohumeral ligament.
- Felt to be related to repetitive throwing leading to traction osteophyte formation.
- Occurs in 20% of major league pitchers (Wright RW, AJSM 2004;32:121). Generally asymptomatic
Throwers Exostosis Anatomy
Throwers Exostosis Clinical Evaluation
- Posterior shoulder pain during ball release
- LocaI discomfort and tenderness in the posterior shoulder with referred pain to the deItoid region.
- May be unable to continued throwing due to posterior shoulder, and referred deltoid pain.
Throwers Exostosis Xray / Diagnositc Tests
- Bennett's or modified Bennett's view of the shoulder demonstrates exostosis on inferior aspect of glenoid.
Throwers Exostosis Classification / Treatment
- Shoulder arthroscopy, joint capsule incised on the posterior side of the labrum directly over the exostosis. Exostosis then resected with shaver or bur.
Throwers Exostosis Associated Injuries / Differential Diagnosis
Throwers Exostosis Complications
- Inabilitly to return to pre-op level
Throwers Exostosis Follow-up Care
- 55% return to preinjury level of competition after arthroscopic excision (Meister K, AJSM 1999;27:133)
Throwers Exostosis Review References
- Wright RW, AJSM 2004;32:121
- Meister K, AJSM 1999;27:133
- Bennett GE: Elbow and shoulder lesions of baseball players. Am J Surg 98: 484–492, 1959
- Bennett GE: Shoulder and elbow lesions distinctive of baseball players. Ann Surg 126: 107–110, 1947
- Bennett GE: Shoulder and elbow lesions of the professional baseball pitcher. J Am Med Assoc 117: 510–514, 1941