Difference between revisions of "Meckel diverticulum"
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'''Meckel diverticulum''' (also '''Meckel's diverticulum'''), is congenital structure of the distal [[small bowel]] that occasionally gets inflamed and may present with appendicitis-like symptoms. | '''Meckel diverticulum''' (also '''Meckel's diverticulum'''), is congenital structure of the distal [[small bowel]] that occasionally gets inflamed and may present with [[acute appendicitis]]-like symptoms. | ||
==General== | ==General== | ||
Revision as of 20:39, 22 March 2016
Meckel diverticulum (also Meckel's diverticulum), is congenital structure of the distal small bowel that occasionally gets inflamed and may present with acute appendicitis-like symptoms.
General
- Most common congenital anomaly of the gastrointestinal tract.[1]
- Remnant of the omphalomesenteric duct - a connection of the yolk sac and midgut.
The rule of 2s:
- 2 feet from the terminal ileum
- 2% of the population
- 2% symptomatic.
- 2 inches long.
- 2 year old.
- 2 types of epithelium - gastric and pancreatic.
Main clinical DDx of a symptomatic Meckel diverticulum:
Gross
- Antimesenteric attachement, i.e. a Meckel's diverticulum hangs off the side opposite of the mesentery.
Image:
Microscopic
Features:[1]
- Small bowel mucosa.
- +/-Gastric mucosa:
- Foveolar epithelium: champagne flute-like columnar epithelium.
- Oxyntic mucosa: parietal cells (pink) and chief cells (purple).
- +/-Pancreatic epithelium:
- Pancreatic acini.
Images
- Gastric foveolar epithelium in a MD (radiographics.rsna.org).
- Gastric glands in a MD (radiographics.rsna.org).
- Pancreatic glands in a MD (radiographics.rsna.org).