PATHOLOGY Gastro N* Q-2

[Roxanita]

A 20-year-old man has gastrointestinal bleeding due to Meckel's diverticulum. Histologic evaluation of the resected diverticulum is most likely to show

A) acute bacterial inflammation
B) carcinoid tumor
C) gastric mucosa
D) an impacted enterolith
E) varices at the neck of the diverticulum

[Lorena]

is it c??

Meckel's diverticulum presents with ectopic tissue, found in approximately 50 percent of cases, consists of gastric tissue in 60 to 85 percent of cases and pancreatic tissue in 5 to 16 percent.

[Roxanita]

Meckel diverticulum occurs on the antimesenteric border of the ileum, usually 60 cm proximal to the ileocecal valve. On average, the diverticulum is 2.99 cm long and 1.92 cm wide. Meckel diverticulum is a true diverticulum because it contains all layers of the intestinal wall. The heterotopic mucosa is likely to be gastric in origin in 80% of cases of Meckel diverticulum. This is important because peptic ulceration of this or adjacent mucosa can lead to pain, bleeding, and/or perforation.

Although jejunal, colonic, rectal, pancreatic, duodenal, and endometrial tissues have all been found in the diverticulum, heterotopic gastric mucosa is the most common tissue observed.


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