Extraneural perineurioma of the face: an unusual cutaneous presentation of an uncommon tumour.

Perineurioma is an uncommon, benign tumour of the peripheral nerve sheath that has two major clinicopathological forms -- intraneural and extraneural. We present a case of extraneural perineurioma that occurred at an unusual site -- the facial skin of a 70-year-old woman -- which illustrates the wide, and potentially misleading, clinicopathological spectrum of this poorly recognized tumour. Copyright 2001 The British Association of Oral and Maxillofacial Surgeons.