Patent vitellointestinal duct is the most common omphalomesenteric duct anomaly to present with symptoms. A 10-day-old child presented with increase in the size of a polypoidal lesion into a large, "Y"-shaped reddish, prolapsing lesion, discharging gaseous, and fecal matter at her umbilicus. A laparoscopic exploration was performed, followed by wedge resection and anastomosis. No complications occurred during postoperative follow-up. A patent vitellointestinal duct with ileal prolapse. The resection of extended intraperitoneal intestinal tube was performed. During the follow-up 3 months after surgery, the umbilical cord of the child healed well after surgery. Timely surgical treatment can minimize the occurrence of complications, and the overall prognosis is good after surgery.