Urachal anomalies are rare abnormalities resulting from incomplete closure of the urachus during fetal development. Transverse colo-urachal-cutaneous fistula is an uncommon complication of urachal remnant. We report a case of laparoscopic resection of a transverse-urachal fistula in an adult with cecal cancer. A 56-year-old woman was admitted to hospital with an abscess around the umbilicus. Abdominal CT revealed a mass extending from the umbilicus to the lower abdomen, and incidentally revealed cecal cancer. During antibiotic treatment, the abscess ruptured from the navel. No colon diverticula were identified with barium enema examination. The transverse colo-urachal-cutaneous fistula was detected through fistulography. The patient was thus diagnosed with cecal cancer and urachal remnant with fistula to the transverse colon. Laparoscopic resection was successfully performed using 5 ports and a small midline incision. The postoperative course was favorable. This is the first report of a unique case of transverse colo-urachal fistula in an adult woman with cecal cancer.