[The perineal implantation of a bladder tumor through urethro-vasal reflux].

Perineal implantation of urinary bladder cancer in a 57-year-old male is reported. The patient had been suffering from incomplete paraplegia and neurogenic bladder for these 29 years because of accidental injury of lumbar spinal cord with episodes of bladder stones two times and right epididymitis three times, and presented urinary leakage from a perineal fistula. The fistula orifice was surrounded by a hard mass lesion. Bilateral swelling of inguinal lymph nodes was present. Fistulogram and voiding cysto-urethrography revealed reflux from posterior urethra to the fistula through right vas and epididymis. Histological diagnosis of resected perineal mass and biopsied left inguinal lymph node was transitional cell carcinoma with predominant metaplasia of squamous cell carcinoma. Tissues obtained by TUR-biopsy of a mass lesion at bladder wall was also histologically diagnosed transitional cell carcinoma with metaplasia of squamous cell carcinoma. The present case indicates implantation of a bladder tumor to perineum by urethero-vasal reflux and metastases to inguinal lymphnodes from the perineal lesion.