Neurofibromatosis, elbow mass Note that this exam was not tailored for evaluation of the internal structures of the elbow.Within the volar and radial soft tissues of the elbow between the brachioradialis and brachialis muscles and along the expected course of the radial nerve is a well-circumscribed mass measuring 1.7 x 1.4 x 2.7 cm in the greatest transverse, AP, and craniocaudal dimensions. The mass is predominantly hyperintense to skeletal muscle on T2-weighted sequences (although contains a small rounded focus of low signal intensity) and isointense to skeletal muscle on T1 sequences. The mass does not appear to invade the surrounding fat planes and is and otherwise does not demonstrate aggressive features. Following contrast administration, there is central, solid target-like enhancement. This mass was evident on the comparison examination from 2011 and has increased from that exam when it measured approximately 1.5 x 1.2 x 2.1 cm.A second similar appearing mass is identified within the long head of the triceps muscle along the expected course of the ulnar nerve. This mass measures approximately 1.6 x 1.8 x 2.6 cm in the greatest transverse, AP, and craniocaudal dimensions. Following contrast administration, there is predominantly central, solid enhancement. This mass was evident on the comparison examination from 2011 and has increased from that exam when it measured 1.1 x 1 x 2.5 cm.A third smaller mass demonstrating similar signal characteristics and enhancement is only partially visualized along the radial portion of the distal forearm and measures at least 1 x 1 cm. This mass was partially visualized on the comparison examination from 2011 but has also appear to increase from that exam when it measured less than 1 cm.The underlying marrow signal of the distal humerus and proximal forearm are normal. Within the limits of this exam, the ligaments and tendons of the elbow appear normal. There is no joint effusion.
Multiple soft tissue masses consistent with peripheral nerve sheath tumors. These have increased in size from a comparison exam of the right humerus dated 4/6/2011.