The joints of 56 patients with polymyalgia rheumatica were examined for evidence of inflammatory synovitis. x Rays, isotope scans, and thermography supplemented clinical examination. Control sternoclavicular joints were examined at necropsy. Peripheral and axial synovitis were uncommon and the results contrast with the findings of several recent studies.

A rapidly enlarging right sternoclavicular mass in a young male was labeled as a nonspecific mass. MRI played a crucial role in characterizing the lesion, helping to define the possible mesenchymal origin and the relative involvement of the surrounding structures. We also discuss the differential diagnosis of an extraosseus Ewing sarcoma (ES), with its imaging findings.

Accepted for publication 7 June 1995 Abstract Posterior dislocation of the sternoclavicular joint is uncommon, accounting for less than 0-11% of all dislocations. Since 1824 a little more than 100 cases have been reported, and the majority in the past 20 years. A review of published reports suggests that this injury is seen particularly in connection with American football. A typical case is de...