Volar wrist mass Within the volar soft tissues of the forearm is a well-circumscribed mass measuring 3.7 x 3 x 7.8 cm in the greatest transverse, AP, and craniocaudal dimensions. Within the mass are very thin septations but no solid nodular components and demonstrates fat signal intensity on all sequences. The mass also causes mild displacement of the median nerve which otherwise appears normal. The signal and caliber of the surrounding flexor musculature is normal. There is a mild amount of increased marrow signal intensity within the distal ulna near the ulnar styloid which is of uncertain clinical significance. The marrow signal intensity of the radius and ulna are otherwise normal. Although not tailored for the evaluation of the tendons, the flexor and extensor tendons appear grossly unremarkable.
Soft tissue mass within the distal forearm demonstrates imaging characteristics most consistent with a lipoma. Note that contrast was not administered for this exam but there are no discrete nodular component identified.