Neurofibromatosis type 1 in a child of a parent with segmental neurofibromatosis (NF-5).

Neurofibromatosis type 1 (NF-1) was incidentally diagnosed in a 1-year-old girl. Her father was found to show the cutaneous signs of segmental neurofibromatosis (NF-5). This observation supports the possibility that subjects with NF-5 can transmit NF-1 to their offsprings in some cases, which has to be considered in genetic counseling.