title: A case of an omphalomesenteric duct remnant in an adult treated with laparoscopic surgery.
abstract: BACKGROUND
  The presence of an omphalomesenteric duct (OMD) remnant is a rare condition that typically affects the pediatric population. This report describes an extremely rare case of an OMD remnant that was diagnosed and resected by laparoscopic surgery in an adult.
  
  
  METHODS
  A 52-year-old man underwent a medical examination at our hospital for right lower quadrant pain. Laboratory findings showed slight leukocytosis and an elevated C-reactive protein level. A luminal structure connected to the umbilicus was detected in the right pelvic wall by abdominal computed tomography, and an OMD remnant was suspected. Laparoscopic surgery was performed by inserting three trocars into the left side of the abdomen; no trocars were inserted near the umbilicus. This procedure provided both a good field of view around the umbilicus and adequate working space. We definitively diagnosed the structure as an OMD remnant and resected it with minimal invasion. The patient was discharged on postoperative day 7 without complications. Pathologic analysis found the lumen is covered by ileum-like mucosa, and a microabscess is formed in the surrounding fat tissue.
  
  
  CONCLUSIONS
  OMD remnants are uncommon, and their diagnosis is difficult. Most reports advocate for prompt surgical resection in symptomatic patients.
  
  
  CONCLUSIONS
  In the present case, definitive diagnosis and treatment were accomplished with minimally invasive laparoscopic surgery.
authors: Department of Surgery, National Hospital Organization Kumamoto Medical Center, 1-5 Ninomaru, Kumamoto 860-0008, Japan.
authors: Keisuke
authors: K
authors: Morita
authors: Department of Surgery, National Hospital Organization Kumamoto Medical Center, 1-5 Ninomaru, Kumamoto 860-0008, Japan.
authors: Yoshio
authors: Y
authors: Haga
authors: Department of Surgery, National Hospital Organization Kumamoto Medical Center, 1-5 Ninomaru, Kumamoto 860-0008, Japan.
authors: Nobutomo
authors: N
authors: Miyanari
authors: Department of Surgery, National Hospital Organization Kumamoto Medical Center, 1-5 Ninomaru, Kumamoto 860-0008, Japan.
authors: Hiroshi
authors: H
authors: Sawayama
authors: Department of Surgery, National Hospital Organization Kumamoto Medical Center, 1-5 Ninomaru, Kumamoto 860-0008, Japan.
authors: Katsutaka
authors: K
authors: Matsumoto
authors: Department of Surgery, National Hospital Organization Kumamoto Medical Center, 1-5 Ninomaru, Kumamoto 860-0008, Japan.
authors: Takao
authors: T
authors: Mizumoto
authors: Department of Surgery, National Hospital Organization Kumamoto Medical Center, 1-5 Ninomaru, Kumamoto 860-0008, Japan.
authors: Tatsuo
authors: T
authors: Kubota
authors: Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan. Electronic address: hdobaba@kumamoto-u.ac.jp.
authors: Hideo
authors: H
authors: Baba
keywords: Laparoscopic surgery; Meckel’; Omphalomesenteric duct remnant; s diverticulum