Subcutaneous nodules, evaluation for neurofibromatosis Right forearm:There is mild reticulation of the subcutaneous fat within the posterior forearm which also demonstrates slight enhancement suggesting mild inflammation. There are numerous tiny (2 mm) foci of enhancement within the medial subcutaneous fat of the elbow particularly at the level of the radiocapitellar joint. These foci are poorly seen on T1 sequences as they are only slightly hypointense to fat signal and are mildly hyperintense on STIR sequences. Additional slightly larger foci are seen more proximally in the subcutaneous fat both medially and laterally. A tiny nodule is also noted in the volar aspect of the forearm which is best appreciated on the sagittal sequence. Due to the location and size of the foci, it is difficult to determine the origin of these lesions or their relation to the nerves in particular. The musculature of the forearm demonstrates no abnormal signal. The bone marrow signal is also normal.Left forearm:There are similar scattered enhancing subcutaneous nodules although several appear slightly larger than the right forearm. These demonstrate similar signal characteristics on T1 and STIR. One lesion in particular within the radial subcutaneous tissues (axial postcontrast series 15, image 17/28) appears contiguous with surrounding vasculature however again, it is difficult to determine the relation to nerves. The musculature of the forearm demonstrates no abnormal signal. The bone marrow signal is also normal.
Multiple tiny enhancing subcutaneous foci within both forearms. The findings are nonspecific however several appear in close proximity or associated with vasculature and are slightly hypointense on T1 signal raising the question of multiple subcutaneous angiolipomas. Given their small size and location, we cannot determine their relationship to nerves.