NF1 and neurofibromatosis type 1: Neurofibromatosis type 1 (NF1) (formerly known as von Recklinghausen disease) is an autosomal dominant neurocutaneous disorder characterized by several distinct clinical features such as café au lait macules, intertriginous freckling, Lisch nodules, neurofibromas, osseous dysplasia, and a family history of first-degree relatives affected by NF1 [1-3].