[A case of proliferative cystits forming a tumorous lesion associated with male infertility].

A 41-year-old man was referred for infertility to our hospital. Retrograde ejaculation was suspected on several semen analyses. Retrograde cystourethrography showed irregular filling-defect at the base of bladder. Cystoscopic examination revealed a broad-based non-papillary bladder tumor, which was located mainly on the trigone of bladder. Transurethral resection was performed, and histological examination showed proliferative cystitis. Proliferative cystitis is not so rare, but there was no case report of proliferative cystitis associated with male infertility.