Figure 1
MRI of the right upper arm: axial TIR (a), T1 before (b) and T1 after (c) intravenous contrast. Diffuse thickening of the cutis and subcutis (arrowheads in 1a) as well as muscle edema (asterisk in 1a) can be seen. There is an amorphous heterogeneous enhancing mass (arrows in 1b and 1c) extending from the superficial cutis to the biceps muscle, with spicular infiltration reaching the neurovascular bundle.