Neurofibromatosis (NF) is an autosomal dominant disorder with an estimated prevalence of 1 per 3000–4000 individuals.1) Neurofibromatosis type I (NF-1), its most common subtype, also known as von Recklinghausen’s disease, involves a genetic modification on the long arm of chromosome 17. The gene discussed is NF1; the disease is neurofibromatosis type 1.