Fig. 2

Painful large chondrogenic tumor at the proximal humerus prior to surgery without osteosynthesis. Plain radiograph (a) shows typical popcorn-like calcifications (arrow) inside the epiphyseal and metaphyseal lesion. STIR MRI sagittal series (b) and T1-weighted contrast-enhanced axial MRI series (c) reveal large size and aggressiveness with endosteal scalloping (arrow) reducing stability of the proximal humerus