抄録
Congenital urinary umbilical fistula is a rare disorder among anomalies of the urachus. We successfully treated a 5-hour-old male infant who had aplasia of the urachus associated with a hernia into the umbilical cord. The umbilical cord was 4cm in diameter and 3.5cm in height and the intestines were located in the upper half of the umbilical cord as seen through the amniotic membrane. A thumb-sized bladder protruded from the lower half of the umbilical cord. Eleven cases of aplasia of the urachus has been described in Japanese literatures, and had association with hernia into the umbilical cord only 3 caces.
