A neuroma /njuːˈroʊmə/ (plural: neuromata or neuromas) is a growth or tumor of nerve tissue. Neuromas tend to be benign (i.e. not cancerous); many nerve tumors, including those that are commonly malignant, are nowadays referred to by other terms. Acoustic neuroma-a slow-growing, benign tumor of the acoustic nerve. 2  Symptoms, which most often start after the age of 30, can include dizziness, headache, vertigo, loss of balance, ringing sensations, and numbness. 3  Ganglioneuroma-a tumor of the sympathetic nerve fibers arising from neural crest cells.