Umbilical ureteral remnants are umbilical ureteral cysts presenting as cystic masses in the lower abdomen medially, not changing with body position and superficially located in close relationship to the abdominal wall. Large umbilical ureteral cysts resemble intra-abdominal tumors and can compress the intestine, causing abdominal pain and other symptoms. They can also become abscesses due to secondary infection. Both abscesses or cysts can rupture and perforate outside the abdomen, or rupture into the bladder or into the abdominal and pelvic cavities. According to the clinical examination, superficial cystic masses in the subumbilical region vary in size, with the larger ones being palpable and mostly asymptomatic. In the case of secondary infection, a local inflammatory response is seen, and the diagnosis can be clearly established by combining ultrasound, CT, cystography and other imaging examinations. Ultrasound and CT are relatively easy to detect abnormalities in the umbilical ureter, and both can clearly show the type of umbilical ureter remnants. However, ultrasound and CT performance are more difficult to differentiate between infected umbilical ureter and umbilical ureteral tumor. Both infected umbilical ureter and umbilical ureteral tumor appear as strongly echogenic areas on ultrasound; on CT they appear as thick-walled cysts and diffuse attenuation, which makes it difficult to separate the two. Fine needle aspiration and cyst drainage have implications for both disease diagnosis and treatment planning. Umbilical ureteral malformations may have no clear clinical manifestations in the absence of other complications, but some may present with localized vague pain or urinary frequency due to compression of the surrounding tissue by the lumen or cyst enlargement. Common umbilical ureteral diseases include infections, stones and tumors.