[Urothelial carcinoma of the navicular fossa]

We report a case of transitional cell carcinoma arising in the fossa navicularis. The patient was a 74-year-old man. He had no history of sexually transmitted disease or urethral stricture. Clinically, the tumor was suspected to be a condyloma acuminatum; however, the pathological diagnosis yielded an unexpected result: transitional cell carcinoma. Radiological examinations and cystoscopy showed no other tumor besides the primary cancer in the fossa navicularis. Partial resection of the urethra was performed and the patient has been without evidence of disease for 3 years.