Colonic duplication is a rare congenital anomaly. Many types of heterotopic tissue were identified within the wall of duplication. However, studies of ectopic immature renal tissue (EIRT) involving colon duplication in an adult have yet to be reported.

A 23-year-old woman visited our hospital with symptoms of recurrent abdominal pain and chronic constipation. Image analysis via abdomino-pelvic computed tomography, Gastrografin contrast study, and colonoscopy showed a blind and dilated bowel loop filled with fecal material located on the mesenteric side of the sigmoid colon. We established a diagnosis of sigmoid colon duplication and decided to perform a laparoscopic investigation. Segmental resection of the sigmoid colon with duplication was done. Microscopically, the duplicated segment showed all three layers of the bowel wall and EIRT in the wall of the duplication. The postoperative period was uneventful and the patient was discharged nine days after the surgery without complications. She has been doing well 12 mo after the follow-up period.

A comprehensive histopathologic examination for ectopic tissues or tumors is mandatory after resection of colon duplication.

• Colon duplication
• Ectopic immature renal tissue
• Case report

Gastrointestinal duplications are uncommon congenital malformations that can occur anywhere along the gastrointestinal tract. Most cases are recognized before the age of 2 years, and those encountered in adults are rare. We describe here a case of ascending colon duplication in a 20-year-old male that caused intussusception and was treated laparoscopically. Although computed tomography revealed a cystic mass filled with stool-like material, the preoperative diagnosis was a submucosal tumor of the ascending colon. We performed a laparoscopic right colectomy, and the postoperative pathological diagnosis was duplication of the ascending colon, both cystic and tubular components. We conclude that gastrointestinal duplications, although rare, should be considered in the differential diagnosis of all abdominal and submucosal cystic lesions and that laparoscopy is a preferred approach for the surgical treatment of gastrointestinal duplications.

• Gastrointestinal duplication
• Colonic duplication
• Laparoscopy
• Intussusception
• Congenital abnormalities

• Biopsy
• Colectomy/methods
• Colon/abnormalities
• Colon/diagnostic imaging
• Colon/surgery
• Colonic Diseases/diagnostic imaging
• Colonic Diseases/etiology
• Colonic Diseases/surgery
• Colonoscopy
• Humans
• Intussusception/diagnostic imaging
• Intussusception/etiology
• Intussusception/surgery
• Laparoscopy
• Male
• Tomography, X-Ray Computed
• Treatment Outcome
• Young Adult

• Adult
• Anastomosis, Surgical/methods
• Colectomy/methods
• Colon, Sigmoid/abnormalities
• Colon, Sigmoid/surgery
• Colonic Diseases/congenital
• Colonic Diseases/diagnosis
• Colonic Diseases/surgery
• Diagnosis, Differential
• Female
• Humans
• Laparotomy
• Tomography, X-Ray Computed

• Acute abdomen
• Duplication
• Laparotomy
• Sigmoid colon