Presentation
Painful swelling of the lateral aspect of the right arm. Had twice resection of a soft tissue mass at the same level.
Patient Data
There is a soft tissue mass with ill-defined irregular margins of the lateral aspect of the rigt arm at the junction middle-lower 1/3, measuring 54 x 36 x 30 mm. It elicits an isosignal to the muscles on T1, high signal on T2 with vivid homogeneous enhancement on post-contrast sequences. The lesion is centreted of the superficial fascia with deep extension encasing the radial and posterior cutaneous nerves, infiltrating the triceps brachii (lateral head) and posterior aspect of the brachioradialis muscle. Normal thickness and signal intensity of the adjacent radial cortex with homogeneous bone marrow.
Case Discussion
MRI features of a soft tissue tumor of the right arm encasing the radial and posterior cutaneous nerves and infiltrating tha adjacent muscles histologically proven as a desmoid tumor (recurrence).