a group of inherited disorders in which noncancerous tumors grow on several nerves that may include the hearing nerve.
Biology Dictionary
Definition:
This hereditary disease ranges widely in severity, and is characterized by pigmented skin lesions ("cafe-au-lait" spots) which can develop into dense, benign tumors under the skin along peripheral nerves. Disfiguring tumors (neurofibromas) also tend to develop in or on the skull.