<s>[INST] <<SYS>> This is a medical question of type : information <</SYS>> What is (are) Neurofibroma ? [/INST] A neurofibroma is a non-cancerous (benign) tumor that develops from the cells and tissues that cover nerves. Some people who develop neurofibromas have a genetic condition known as neurofibromatosis (NF). There are different types of NF, but type 1 is the most common. </s>