Purpose or Case Report: Urachal remnants include patent urachus, urachal cyst, urachal sinus and urachal diverticulum. Clinical presentation is variable depending on the type of urachal remnant and the patient’s age. Infants with a patent urachus often present with persistent umbilical discharge or granuloma, while older patients may present with urinary tract infection, or inflammation of the urachal remnant mimicking appendicitis or other intraabdominal inflammatory process. Urachal remnants may also be incidental or may be associated with an existing syndrome such as Eagle Barrett Syndrome. In this presentation, to understand the derivation of the different types of urachal remnants, the embryologic development of the urachus and its relationship to the bladder and allantois is reviewed. Diagnostic ultrasonographic, fluoroscopic and CT images in patients with different types of urachal remnants are shown. Additionally, an unusual case of bladder prolapse presenting as an umbilical mass in a newborn with a patent urachus is presented.
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