Fibrolipomatous Hamartoma of the Median Nerve

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CK So, KF Tam, CY Lui, CM Lee

Hong Kong J Radiol 2007;10:81-4

This report is of a 64-year-old woman with a fibrolipomatous hamartoma of the median nerve who presented with recent enlargement of a right palm mass that had been present for more than 30 years. Magnetic resonance imaging demonstrated pathognomonic features of an enlarged median nerve with thickened individual neural fascicles interspersed with fatty tissue. Magnetic resonance imaging also showed characteristic tumour growth following the branching pattern of the nerve and restriction of tumour fat proliferation at the fibro-osseous carpal tunnel. Debulking of the tumour without complete excision was performed. The pathognomonic magnetic resonance imaging features enable accurate diagnosis and obviate unnecessary biopsy of this tumour.