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Arch Pediatr Adolesc Med. 2006;160:301.

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Denouement and Discussion: Infected Urachal Cyst

The lesion was surgically excised, and histopathologic analysis revealed an infected urachal cyst with an umbilical artery remnant.

The urachus is a fibrous structure derived from the embryonic communication that extends from the bladder to the umbilicus.¹ In the newborn period, it becomes a fibrous structure known as the medial umbilical ligament. It is normally obliterated, but urachal abnormalities result from a failure of this structure to regress. Four types of urachal abnormalities are recognized, including patent urachus, urachal sinus, urachal diverticulum, and urachal cyst. The patent urachus is the most severe and is usually diagnosed early in the newborn period because of its more obvious presentation of urinary drainage from the umbilicus. It is a direct connection between the bladder and the umbilicus due to complete persistence of the urachus. The urachal sinus and diverticulum, by contrast, represent partial urachal remnants. The urachal sinus communicates with the umbilicus but . . . [Full Text of this Article]

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Arch Pediatr Adolesc Med. 2006;160(3):300.
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