The X marks the site of the teres minor tendon insertion under the

Teres Minor - Physiopedia

Teres minor injury related to vaccine administration - ScienceDirect

Rotator cuff - Wikipedia

Shoulder Health: An Overview of Anatomy and Injury - On Target Publications

Teres major muscle - Wikipedia

Pectoralis Minor - Physiopedia

Anatomy Of The Teres Minor Muscle - Everything You Need To Know - Dr. Nabil Ebraheim

Humerus muscle maps for L. pictus (right side): (A) medial view, (B)

Shoulder - NYSORA

Pathology of the Teres Minor