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CT findings of pelvic lipomatosis of nerve.

Torigian DA and Siegelman ES(AQ1) ipomatosis of nerve, also known as fibrolipomatous hamartoma or fibrofatty proliferation of nerve, is a rare benign tumorlike lesion that most often affects the median nerve or its branches. Rarely, involvement of the nerves of the upper and lower extremities and of the face have been reported [1–7]. Frequently, no symptoms or signs are present, although over 50% of patients are symptomatic because of mass sensation, focal compressive neuropathy, or associated macrodactyly [1, 2, 7–9]. We report the CT findings of a woman with presumed asymptomatic pelvic lipomatosis of nerve involving the right sciatic nerve and lumbosacral plexus, as this lesion may potentially be mistaken for the more common retroperitoneal well-differentiated liposarcoma.