Abstract
The patient was a 66-year-old woman who presented to the outpatient gynecology clinic of our hospital with the chief complaint of abnormal vaginal bleeding. Transvaginal sonography revealed a mass lesion at the top of the bladder, and the patient was referred to our department. Transurethral biopsy of the bladder tumor revealed the diagnosis of adenocarcinoma. After various diagnostic examinations, we made the diagnosis of urachal cancer invading the bladder wall, and performed complete resection of the urachus and partial resection of the urinary bladder. We report this case with a brief review of the literature.