My friend has neurofibromatosis. what is that?

NF resource: Here is a great resource where you can find lots of answers about neurofibromatosis: http://www.nfnetwork.org/

Mostly genetic: Neurofibromatosis,mostly inherited problem, or mutation with degrees involvement from mild to severe. Neurofibroma benign tumor that originates from the nerve cell in skin or jut under the skinType1 usually appears in children with brown flat skin spots, freckling in armpits, and soft tumors under the skin and sometimes bone deformity.Type2 usually benign brain tumors vestibular/acoustic neuromas