Figure 7

MR-Imaging of the upper arm in axial (a) and coronal (b) orientation. Both images (fat saturated T1 weighted Images after contrast administration) show a contrast enhanced soft tissue mass in the proximal upper arm with a circular extent around the proximal humeral bone. Extensive soft tissue involvement suggested malignancy but a definitive diagnosis was not possible. On both images a large necrotic central part without contrast enhancement is visible.