28-year-old male with a history of neurofibromatosis type I presents with lower back pain radiating to the left leg and sciatic distribution. Evaluate for pelvic/sciatic neurofibroma. Note is made of multiple foci of increased signal abnormality on fluid sensitive sequences within the cutaneous, subcutaneous tissue and musculature of the pelvis compatible with the stated history of neurofibromatosis, although these are incompletely characterized on this noncontrast examination. More specifically, the largest lesion in the region of the left gluteus medius muscle measures 2.0 x 1.2 cm (image 15; series 6) which is suggestive of a neurofibroma, although this is again incompletely characterized on this noncontrast examination. The sciatic nerve is normal in appearance, bilaterally. The imaged musculature of the hips is normal in appearance. No bone marrow signal abnormality is identified. Note is made of an apparent disc bulge at the level of L5/S1 with apparent annular fissure, although this is incompletely characterized on this examination.
Multiple foci of signal abnormality within the subcutaneous tissue and musculature of the pelvis consistent with the stated history of neurofibromatosis, although these are incompletely characterized on this noncontrast examination. The left sciatic nerve is normal in appearance. Disc bulge at the level of L5/S1. This could be better characterized with a dedicated lumbar spine MRI if clinically warranted.