Type:
Educational Exhibit
Keywords:
Abdomen, Paediatric, Small bowel, CT, Ultrasound, Education, eLearning, Inflammation
Authors:
H. CHEKIR1, Y. Ben cheikh2, T. Kamoun3, A. Ben Abdallah4, N. Mama1, I. Hasni5, N. Arifa1, H. Jemni1; 1Sousse/TN, 2Imaging department, CHU Sahloul, Soussa/TN, 3soussa/TN, 4Sousse, Tunisia/TN, 5sousse, sousse/TN
DOI:
10.26044/ecr2019/C-3510
Background
Meckel’s diverticulum is a remnant of the vitelline duct (omphalomesenteric duct),
which is usually located on the antimesenteric border of the ileum
Pathology/ Embryology /anatomy
General features
Partial or complete failure of involution of the omphalomesenteric duct results in a variety of anomalies,
including Meckel diverticulum.It is the most common omphalomesenteric duct anomaly and the most prevalent congenital malformation of the small bowel.
Gross pathologic features
Meckel diverticulum often is described according to the so-called rule of 2s: It is seen in approximately 2% (range,
0.3%–3%) of the population; it usually is detected in the antimesenteric border of the terminal ileum within 2 feet proximal to the ileocecal valve; it is about 2 inches long; it is as common in men as it is in women,
although men are twice as likely to have complications;
May contain enteliths,
bezoars,
or ingested foreign bodies
it usually is symptomatic before the patient reaches 2 years of age
Microscopic features
It is a true diverticulum containing all normal layers of the intestinal wall,
arising from the anti-mesenteric border of the ileum.
It has its own blood supply : It’s through remnants of the embryologic omphalomesenteric (vitellointestinal) artery arising from an ileal branch of the superior mesenteric artery.
it may include two types of heterotopic mucosa (gastric and pancreatic) ; 90 % of cases with bleeding contain gastric mucosa