Neurofibromatosis, evaluate tumor mass in right lower pelvis/inguinal area PELVIS:PROSTATE, SEMINAL VESICLES: No significant abnormality noted.BLADDER: No significant abnormality noted.LYMPH NODES: No lymphadenopathy.BOWEL, MESENTERY: No significant abnormality noted.BONES, SOFT TISSUES: Heterogeneously enhancing T2 hyperintense mass between the right iliacus and psoas muscles measures 3.8 x 3.1 x 3.9 cm (series 6, image 16). The mass demonstrates internal restricted diffusion and may invade the adjacent iliacus muscle.
Right pelvic mass suspicious for a peripheral nerve sheath tumor with possible invasion of the right iliacus muscle. This lesion would be amenable to biopsy as clinically warranted to exclude a malignant nerve sheath tumor.