Congenital neurofibroma with hypertrichosis.

Abstract

The hypertrichosis characterizes some nevi usually present at birth, such as the hairy nevus properly said and nevus leiomyoma. Congenital melanocytic nevus is often associated with hypertrichosis, but this becomes evident later in life, usually around the third year of life. In Becker's nevus hypertrichosis becomes usually evident in the peripubertal period probably due to hormones. There are rare reports in the literature of neurofibroma associated with hypertrichosis, sometimes within of a full-blown case of peripheral neurofibromatosis (NF1) but sometimes independently from this genodermatosis (2). We recently reported a case of congenital neurofibroma with hypertrichosis (1). In the presence of congenital hypertrichosis, when there is an infiltration of the skin without contractility, physicians should think to neurofibroma even in the absence of NF1.