The etiology of umbilical ureteral disease can be attributed to a group of related diseases caused by untimely atresia of the umbilical ureter after birth, which is not uncommon clinically. The main clinical manifestations of patients are lower abdominal pain and cloudy urine. A tough mass with poor mobility and pressure pain can be palpated at the subumbilical level in the midline of the abdomen. Urine routine: elevated white blood cells. Enhanced CT: Irregular bladder morphology, uneven thickening of the bladder wall, long abnormal reinforcing shadow in the anterosuperior wall with unclear borders, irregular marginal reinforcement after enhanced scanning, with the upper edge connected to the umbilicus. Cystoscopy generally reveals a cauliflower-like mass in the anterior wall of the bladder, and in some cases fistula formation is faintly visible. Surgical treatment is generally performed with complete intraoperative removal of the umbilical ureteral mass and part of the bladder, which needs to be sent for rapid intraoperative freezing to rule out the possibility of malignancy. Patients usually recover well after surgery. At present, the preoperative diagnosis of umbilical ureteral carcinoma is based on CT imaging. A typical CT scan of umbilical ureteral carcinoma can show an increased density shadow located in the Retzius interval in line with the umbilical ureter, and enhanced scan can show moderate enhancement or more. The pathological type is mostly mucinous adenocarcinoma or indolent cell carcinoma, and its prognosis is poor with late detection. Umbilical ureteral abscesses are mostly caused by the umbilical ureter not being atretic and confined by infection wrapping, with clear boundaries, and the surrounding fatty layer and muscle layer may have different degrees of inflammatory hyperplastic reactions due to inflammatory stimulation, with more obvious pus urine and recurrent urinary tract infection symptoms. It is difficult to differentiate umbilical ureteral abscess from umbilical ureteral cancer: 1. Clinical symptoms are not obvious, patients do not have fever and other inflammatory manifestations, the onset of disease is more urgent, abdominal mass and hematuria are similar to umbilical ureteral cancer; 2. Enhanced CT shows uneven enhancement at the edges, and uneven thickening of bladder wall is seen, and cystoscopy also finds occupying lesions, all of which support the diagnosis of umbilical ureteral cancer. Preoperative pathological diagnosis is very necessary. For patients with suspected umbilical ureteral cancer with negative preoperative pathology, rapid intraoperative pathology is very important, because a few umbilical ureteral abscesses can be manifested as different degrees of cancer on imaging, which is difficult to differentiate; preoperative detailed medical history should be pursued, as umbilical ureteral cancer mostly starts insidiously and develops rapidly. In addition, the umbilical ureteral abscess can be treated with antibiotics and the symptoms can improve significantly in a short period of time.