Atypical site of calcific tendinopathy around the shoulder with Pectoralis major insertion

Calcium deposit tendinopathy of the shoulder is a commonly observed condition, often presenting as non-traumatic shoulder pain. It typically resolves spontaneously, characterized by the deposition of calcium hydroxyapatite at the tendon insertion site, followed by natural regression and subsequent tendon healing. Proper identification of the radiological characteristics of this condition is crucial to avoid unnecessary procedures, such as biopsy. This report presents the case of a 26-year-old female diagnosed with calcific tendinitis affecting the pectoralis major tendon at its humeral insertion—a rare site of involvement, with only a few cases reported in the literature.