Urachus Remnant: Importance of Early Diagnosis in Preventing Complications

The urachus remnant is a vestigial structure that results from incomplete involution of the cloaca and allantois, forming a duct between the bladder and the umbilical scar. Normally, it obliterates to form the middle umbilical ligament. Despite its rarity and often nonspecific symptoms, it can be incidentally discovered during imaging tests or due to complications, such as infections or neoplasms. The first diagnostic test usually ordered is an ultrasound, followed by computed tomography or magnetic resonance imaging for a more detailed evaluation. Early diagnosis and appropriate management, which may include surgical resolution, are important to prevent complications. This report discusses the case of a 4-year-old female presenting with abdominal pain, fever, and constipation, who was diagnosed with a urachus remnant through ultrasound. The patient responded well to antibiotic therapy for a urinary tract infection and was advised to follow-up with ultrasound for the urachus remnant. The article reviews the potential complications, diagnostic methods, and treatment options for urachus remnants, highlighting the importance of early detection in preventing more severe outcomes, including malignancies.