The neurofibromatosis (NF) are genetic disorders of the nervous system. At this time two distinct forms are known: NF1 and NF2. One baby in every four thousand is born in the United States with NF1. It is one of the most common genetic disorders, affecting some one hundred thousand americans. NF2 is less common and occurs in only one and every forty thousand births. In both forms of NF severity of symptoms vary greatly. The …showed first 75 words of 1418 total…

…showed last 75 words of 1418 total…following symptom's: six or more café au lait macules over 5 mm in greatest diameter in prepubertal individuals and over 15 mm in greatest diameter in postpubertal individuals, two or more neurofibromas of any type or one plexiform neurofibroma, freckling in the axillary or inguinal regions, optic glioma , two or more Lisch nodules (iris harmartomas) ,and a distinctive osseous lesion such as sphenoid dysplasia or thinning of long bone cortex with or without pseudoarthrosis .