What do you know about Neurofibromatosis?
Neurofibromatosis (NF) is a genetic disorder of the nervous system which causes tumors to form on the nerves anywhere in the body at any time. This progressive disorder affects all races, all ethnic groups and both sexes equally. NF is one of the most common genetic disorders in the United States (one in every 3,000 to 4,000 births).
NF has two genetically distinct forms: NF-1 and NF-2. The effects of NF are unpredictable and have varying manifestations and degrees of severity. There is no known cure for either form of NF, although the genes for both NF-1 and NF-2 have been identified.
NF is an autosomal dominant genetic condition; it is not contagious. Approximately 50% of those affected with neurofibromatosis have a prior family history of NF. The other 50% of cases are the result of spontaneous genetic mutation. If an individual does not have NF, s/he can not pass it on to his/her children.
Ref. https://www.nfinc.org/what.shtml
This has got to be caused by something related to the environment in general. I see that it is usually found at birth, and others are spontaneous mutation. Another disease that we cant stop or cure. Looking it up, there isn't allot of outside contributions to help in the curing of the disease either.