Subcoracoid impingement is an unusual form of shoulder impingement results from narrowing of the coracohumeral interval (space between the tip of the coracoid and the humerus). Narrowing is typically seen in the setting of prior rotator cuff repair, but occasionally also results from congenital narrowing or trauma.
The structures affected are 2:
- subscapularis tendon
- long head of the biceps tendon
- middle glenohumeral ligament.
Clinically, patients present with pain in the anterior aspect of the shoulder when the arm is held at the side (adducted, internally rotated and in forward flexion - aka military parade rest position) 2.
- 1. Kaplan P. Musculoskeletal MRI. W B Saunders Co. (2001) ISBN:0721690270. Read it at Google Books - Find it at Amazon
- 2. Giaroli EL, Major NM, Lemley DE et-al. Coracohumeral interval imaging in subcoracoid impingement syndrome on MRI. AJR Am J Roentgenol. 2006;186 (1): 242-6. doi:10.2214/AJR.04.0830 - Pubmed citation