Case report of a seminal vesicle schwannoma involving prostate and bladder: diagnostic pathway and management

Seminal vesicle neoplasms are extremely rare. Schwannoma is a benign tumor of the peripheral nerve sheath composed of Schwann cells. Most of these tumors are silent and become symptomatic with compression of adjacent organs and nerves. We present a case of a 65-year-old man with a history of predominant storage lower urinary tract symptoms. Prostate-specific antigen was within normal ranges, and imaging documented a nodular lesion in the prostate, one in the left seminal vesicle and another one adjacent to the right bladder wall. We successfully performed a prostate biopsy and a trans-urethral resection of the bladder to excise and typify the lesion. Histopathology investigation revealed the final diagnosis of schwannoma.