Musculoskeletal Imaging

Dermatofibroma protuberans

a type of xanthoma in which the tumour occurs in the skin and deeper tissues, especially in the trunk and proximal parts of the extremities. The tumour may grow to a considerable size; recurrence and metastasis sometimes occur (Fig.1).

DR/RB

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Fig.1

a. Coronal T1-weighted MR image demonstrates a large exophytic soft tissue mass of intermediate signal intensity arising from the ulnar aspect of the forearm. b. After intravenous administration of gadolinium-containing contrast material, a fat-suppressed coronal T1-weighted MR image displays heterogeneous contrast enhancement.
Dermatofibroma protuberans, Fig.1 (a)
Dermatofibroma protuberans, Fig.1 (b)