A<unk>  (; plural:<unk> ta or<unk> s) is a growth or tumor of nerve tissue.<unk> s tend to be benign (i.e. not cancerous); many nerve tumors, including those that are commonly malignant, are nowadays referred to by other terms.<unk> s can arise from different types of nervous tissue, including the nerve fibers and their myelin sheath, as in the case of genuine neoplasms (growths) like ganglioneuromas and neurinomas. The term is also used to refer to any swelling of a nerve, even in the absence of abnormal cell growth. In particular, traumatic<unk>  results from trauma to a nerve, often during a surgical procedure. Morton's<unk>  affects the foot.<unk> s can be painful, or sometimes, as in the case of acoustic<unk> s, can give rise to other symptoms.
Neuroma
Neurothekeoma
Ameloblastoma
Brown tumor
Hemangioblastoma
Astroblastoma
Noma 
Myxoma