Umbilical artery sinus. Rare cause of umbilical drainage.
D001165:Arteriovenous Malformations / Q000150:complications; D002675:Child, Preschool; D006801:Humans; D008297:Male; D014469:Umbilical Arteries / Q000002:abnormalities*; D014472:Umbilicus; D014497:Urachus