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From the Archives of the AFIP

Meckel Diverticulum: Radiologic Features with Pathologic Correlation¹

¹ From the Departments of Radiologic Pathology (A.D.L.) and Hepatic and Gastrointestinal Pathology (C.M.H.), Armed Forces Institute of Pathology, 6825 16th St NW, Washington, DC 20306-6000; and the Department of Radiology and Nuclear Medicine, Uniformed Services University of the Health Sciences, Bethesda, Md (A.D.L.). Received August 28, 2003; accepted October 7. Both authors have no financial relationships to disclose. Address correspondence to A.D.L. (e-mail: levya@afip.osd.mil).

Meckel diverticulum is the most common congenital anomaly of the gastrointestinal tract, occurring in 2%–3% of the population. It results from improper closure and absorption of the omphalomesenteric duct. Meckel diverticulum is the most common end result of the spectrum of omphalomesenteric duct anomalies, which also include umbilicoileal fistula, umbilical sinus, umbilical cyst, and a fibrous cord connecting the ileum to the umbilicus. The formation of Meckel diverticulum occurs with equal frequency in both sexes, but symptoms from complications are more common in male patients. Sixty percent of patients come to medical attention before 10 years of age, with the remainder of cases manifesting in adolescence and adulthood. Heterotopic gastric and pancreatic mucosa are frequently found histologically within the diverticula of symptomatic patients. The most common complications are hemorrhage from peptic ulceration, small intestinal obstruction, and diverticulitis. Although the clinical, pathologic, and radiologic features of the complications of Meckel diverticulum are well known, the diagnosis of Meckel diverticulum is difficult to establish preoperatively.

Index Terms: Enteritis, 742.274 • Intestines, diverticula, 742.1493 • Intestines, hemorrhage, 95.7181 • Intestines, stenosis or obstruction, 742.723 Intussusception, 742.73

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