Neurofibromatosis 1 with lesions on right forearm Multiple nodules are within the subcutaneous tissues of the forearm particularly within the radial portion. These nodules are iso to slightly hyperintense on T1 relative to skeletal muscle and hyperintense to muscle on T2 sequences. The largest of these is seen within the posterolateral forearm approximately 6.5 cm from the elbow with several others delineated on PACS. The majority of the lesions demonstrate faint homogeneous enhancement following of gadolinium administration. These lesions do not demonstrate aggressive or invasive features.The underlying muscle and bone marrow signal is normal.
Multiple subcutaneous nodules of the forearm which do not demonstrate aggressive characteristics but enhance slightly following contrast administration. Given the subcentimeter size of these lesions, characterization of their relationship with surrounding nerve bundles is unreliable however given the patient's known history of NF-1, these most likely represent small neurofibromas.