Figure 1

Humeral tumor. a: Radiograph of the humerus reveals a lytic proximal lesion with cortical thinning and intralesional calcifications. b: CT scan of the shoulder showing intralesional popcorn-like calcifications. c: MRI T1 images lesion occupying almost the entire humeral epiphysis, with a preserved cortex and no soft-tissue involvement. d: Hematoxylin and eosin staining of clear-cell chondrosarcoma in the humerus consisting of plump cells with well-defined cytoplasmic borders, clear-to-pale eosinophilic cytoplasm and round nuclei. Mitotic figures are scanty and amounts of woven bone are present (x100 magnification). 1e: Joint allograft, without signs of recurrence.