Medial subluxation or dislocation of the long head biceps tendon can occur with repetitive mechanical wear, overuse, or acute trauma. The long head biceps tendon is located inferiorly in the bicipital groove, but ligament deterioration may free the tendon from the bicipital groove. Rotator cuff tears are commonly associated.
Classic history and presentation: PBTR is most commonly due to chronic shoulder degeneration from recurring microtrauma to the tendon, resulting in eventual rupture. However, rupture can occur more acutely after a fall, or in athletes and weight lifters. Patients typically present with pain in the anterior shoulder, swelling and bruising in the arm and/or elbow, minor loss of supination, and a deformity to the contour of the anterior arm.
Prevalence:
- Age – The most common group affected is between the ages of 40 and 60 years; however, this condition can occur in younger individuals, especially young athletes.
- Sex / gender – Male predominance.