Assertion: neurofibromatosis | /r/Causes | non-cancerous tumors
Facets:
value: to grow on nerve tissue
type: PURPOSE
Source sentences:
text: Neurofibromatosis (NF) is a genetic disorder which affects the central nervous system (brain and spinal cord) and the skin and causes non-cancerous tumors (i.e., neurofibromas) to grow on nerve tissue.