Figure 5.

A Initial plain radiographs of the right shoulder appeared normal. B CT scan was performed after a year of progressive shoulder pain and stiffness, showing a destructive lesion involving the glenoid (arrow). C Axial T1-weighted and post-contrast (D) MR images showing destruction of the glenoid with an associated soft tissue mass and involvement of the humeral head. E Bone scan showing increased osteoblastic activity involving the coracoid process and right humeral head and relative photopaenia of the glenoid. F CT-guided percutaneous biopsy was able to obtain a histological diagnosis of malignant fibrous histiocytoma.