The patient, a 67‐year‐old woman, presented to our department with an 11‐month history of pain and swelling over both sternoclavicular joints. She had no significant medical comorbidities. There was no other joint involvement. A, She underwent ultrasonography of the sternoclavicular joints, which revealed synovial proliferation with inflammatory activity on the power doppler study and punctate calcifications. B, A computed tomography scan revealed many intracartilaginous punctuated calcifications. Radiography of the pelvis revealed calcification of the labrum of the right hip. X‐rays of the knees, wrists, and shoulders did not reveal any other calcifications. Although uncommon, a diagnosis of chondrocalcinosis of the sternoclavicular joint was supported by the calcification seen in the right hip. The important clinical teaching of our case is that the involvement of the sternoclavicular joints in chondrocalcinosis is unusual. This diagnosis should always be considered in any sternoclavicular synovitis. Unlike our case, it occurs usually in the polyarticular form, and ultrasonography is a very useful tool in diagnosing sternoclavicular joint involvement 1. ART STERNO CLAV D: right sternoclavicular joint (articulation sterno claviculaire droite [in French]).