Abstract
An 83-year-old woman visited a hospital because of lower abdominal pain. She had no past abdominal operations other than an appendectomy. Inflammation was severe. Thus, we administered antibiotics and an infusion. CAT scan showed an urachal abscess and dilatation of the ascending colon. We operated on her four days after admission. The urachal abscess was about 10cm in diameter. The large omentum was adherent to the abscess wall, such that patency of the transverse colon was lost. We partially resected the abscess wall. There was no communication among the abscess cavity, bladder, and umbilicus. Her post-operative course was good.
