What causes umbilical ureteral fistula and umbilical ureteral cysts? When the human embryo is 10-24 mm old, the bladder is still enlarged to the umbilicus, after which the bladder slowly descends along the anterior abdominal wall, leaving a thin tube connected to the urinary bladder during its descent, this tube gradually becomes thinner and more occluded, becoming a fibrous cord from the umbilicus to the anterior wall of the bladder, if it is not completely occluded and there is still a lumen connected, it becomes an umbilical ureteral fistula, if the two ends are occluded and the middle part is not completely occluded, there is If the two ends are occluded and the middle part is not completely occluded, there is a possibility of cyst formation. What are the manifestations of umbilical ureteric fistula and umbilical ureteric cysts and how are they diagnosed? Umbilical ureteric fistula presents as a non-drying umbilical area and there is always a thin discharge. Umbilical ureteral cysts present as a cystic mass in the lower abdomen, which does not change with body position. What tests should be done for umbilical ureteral fistula and umbilical ureteral cyst? The test can be done by injecting melanoma (methylalan) into the bladder. If the secretion is mucus, the possibility of umbilical-intestinal fistula is much greater than this disease, and further differentiation is needed; umbilical ureteral cysts present as cystic masses in the lower abdomen, which do not change with body position and are superficially located in close relationship with the abdominal wall. What diseases can be easily confused with umbilical ureteral cysts and umbilical ureteral fistulas? It should be differentiated from umbilical enterocutaneous fistula. What diseases can be complicated by umbilical ureteral cysts and umbilical ureteral fistulas? It can be complicated by infection. How should umbilical ureteral cysts and umbilical ureteral fistulas be treated? If there is no infection, surgical resection is recommended. If there is an infection, the infection should be treated aggressively and then surgical resection should be performed after the infection is controlled. What should be done to prevent umbilical ureteral cysts and umbilical ureteral fistulas? There are no effective preventive measures.