Segmental neurofibromatosis: report of 3 cases.

Segmental neurofibromatosis (SNF) is an uncommon variant of neurofibromatosis type 1 (NF-1) that is characterized by café au lait spots, freckles, and/or neurofibromas limited to a body segment. In this report we describe 3 adult patients with SNF who presented with only neurofibromas. Although 2 patients had no systemic involvement, the third patient had hypertrophic cardiomyopathy, a cardiologic abnormality that is associated with neurofibromatosis.