Plexiform schwannoma.
A 33-year-old man had a multinodular tumor on his left index finger. Microscopy revealed a plexiform nerve sheath tumor resembling schwannoma. Including this case, 11 patients from 9 to 39 years old, have been reported with plexiform schwannoma. One patient had von Recklinghausen's neurofibromatosis, and all but one were free of recurrence from 1.5 to 6 years later. Plexiform schwannoma should be distinguished from plexiform neurofibroma because it appears to have neither a significant association with neurofibromatosis nor a propensity for malignant transformation.
D000328:Adult; D005385:Fingers; D006801:Humans; D008297:Male; D009442:Neurilemmoma / Q000473:pathology*; D009455:Neurofibroma / Q000473:pathology; D010524:Peripheral Nervous System Neoplasms / Q000473:pathology*