On Saturday I will be riding 66 miles to support NF Northeast. This organization has provided over $3 million in research grants, and through advocacy has helped generate over $600 million in federally funded research. Neurofibromatosis (NF) is a group of genetic disorders of the nervous system that causes tumors to form on the nerves anywhere in or on the body. Tumors, or neurofibromas, grow along the body's nerves or on or underneath the skin.