Eason A A, Karol J, Collins E J
Urology. 1977 Aug;10(2):159-60. doi: 10.1016/0090-4295(77)90019-x.
A seventy-year-old man with a painless, perineal neoplasm was found to have a granular cell myoblastoma densely adherent to the bulbar urethra. This case represents the fourth known perineal neoplasm of neural origin.