Recently, we performed a radical resection of umbilical ureteral tumor for a septuagenarian with chronic umbilical overflow. Postoperative pathology: intermediate differentiated squamous cell carcinoma of the umbilical ureter, cancerous tissue infiltrated the whole umbilical ureter wall, and no cancer was seen in the cystic margin of the umbilical ureter cut edge and surrounding adipose tissue. The cancer was not seen in the bladder cut edge and surrounding fatty tissue. Postoperative recovery was good and he was discharged cured and further chemotherapy was recommended to reduce the chance of recurrence. We all know that the fetus is connected to the mother by the umbilical cord, receiving oxygen and nutrients from the placenta and sending away metabolites. As the embryo grows, the bladder descends along the anterior abdominal wall, leaving a thin tube, the umbilical ureter, attached to the umbilicus, which degenerates and closes into a fibrous cord before the urethra is formed. If the umbilical ureter does not fibrillate and occlude on its own after birth, it will form an umbilical ureter anomaly. Umbilical ureteral anomalies are congenital anomalies of unknown etiology, mostly seen in males, with an extremely low incidence of about 1 in 300,000. The clinical manifestations are umbilical discharge or urine flow, easy to combine with infection, and bladder irritation signs may appear. It can be divided into 5 types as shown in the figure below (side view) from mild to severe, all of which can become cancerous if left untreated for a long time. Umbilical ureteral carcinoma is even rarer, accounting for only 0.35% to 0.7% of bladder cancers, so that some senior urologists who are not systematic in their theoretical studies and lack the concept of umbilical ureteral lesions may mistake it for general umbiliculitis or general surgery and delay the treatment of the patient. In this case, the patient was not a male but a 71-year-old female who came to the hospital with “umbilical fluid and red, swollen and hard masses in the lower abdomen” and had been there before but did not pay enough attention to it. After careful history and physical examination, a chronic lesion of the umbilical ureter was considered, and the possibility of a tumor was highly suspected. A CT examination of the lower abdomen (2015-12-10) was immediately given and reported as “Soft tissue mass shadow between the umbilicus and the top of the bladder in the area of the lower abdomen in the midline, nature to be determined: tumor of the umbilical ureter? Inflammatory lesion? (see figure above)”. After a thorough physical assessment, careful study of the imaging data to determine the extent of the lesion and its relationship to adjacent organs, and exclusion of intravesical lesions, a standard scope radical surgery was successfully performed on December 23, 2015. Umbilical ureteral carcinoma requires whole-block resection of the umbilicus, umbilical ureter and surrounding lymphatic adipose tissue, adherent peritoneum and part of the bladder wall, and in some patients, partial resection of the rectus abdominis muscle, which is a somewhat complicated surgical procedure, difficult to grasp the extent of the level and risk of accidental injury to the intestinal canal, requiring a certain amount of accumulated surgical experience and the ability to control risks.