Infected umbilical urachal sinus in a neonate.

The urachus is an embryonic tube that connects the upper portion of the bladder to the umbilicus and normally obliterates during embryonic development, forming the median umbilical ligament. Incomplete obliteration of the urachus can result in various anomalies such as congenital patent urachus, umbilical urachal sinus, vesico-urachal diverticulum and urachal cyst. We report a term neonate who presented with swelling and discharge from the umbilical region, which through clinical evaluation and radiological investigations, was diagnosed as an infected umbilical urachal sinus.