Meckel’s Diverticulum

  • Etiology: persistent remnant of omphalomesenteric (vitelline) duct which runs in umbilical cord connecting primitive midgut (terminal ileum) and extraembryonic sac that involutes by 6th week
  • Meckel’s scan: shows simultaneous appearance of radiotracer in stomach + diverticulum as ~ 50% contain ectopic gastric mucosa
  • Clinical: antimesenteric, rule of 2: in 2% of population, is 2 feet from ileocecal valve, 2% get complications, complications occur before 2 years old

Cases of Meckel’s Diverticulum

CT of small bowel obstruction due to Meckel's diverticulum
AXR supine (upper left) and coronal CT with contrast of the abdomen (lower left) show multiple dilated loops of small bowel with thin walls throughout the abdomen. The lower axial CT (upper right) shows a small cystic structure in the midline with a thicker wall than the surrounding dilated bowel which is also seen on the midline sagittal CT (lower right) just beneath the umbilicus.