Urachal carcinoma is an uncommon tumor, with a poor prognosis. The most common histological type is adenocarcinoma, which may produce mucus. The symptoms aren't specific, such as hematuria or abdominal mass. Diagnosis can be made endoscopically with a biopsy or by echography and above all by computerized tomography. The treatment of choice is cystectomy with lymphadenectomy or segmental resection of the bladder to. The Authors refer to a patient with urachal carcinoma, stage IIIA involving the bladder.