Large Partial-Thickness Tear of the Subscapularis Tendon.

A 27-year-old active-duty male sailor directly accessed physical therapy for deep left anterior shoulder pain. The patient sustained his injury the previous day, when he threw a left hook into the body of his sparring partner, creating a sudden high-energy external rotation force. Based on the patient's complaint, mechanism of injury, and internal rotation weakness, the examining physical therapist ordered magnetic resonance imaging. The images revealed a large partial tear, with retraction of the subscapularis tendon at the lesser tuberosity, a labral tear, and an intratendon biceps tendon tear with subluxation. J Orthop Sports Phys Ther 2018;48(12):983. doi:10.2519/jospt.2018.8221.