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Inverted Meckel diverticulum: clinical, radiologic, and pathologic findings
L Pantongrag-Brown1, M S Levine, A M Elsayed
1Department of Radiologic Pathology, Armed Forces Institute of Pathology, Washington, DC 20306-6000, USA.
Radiology
|June 1, 1996
Summary
Inverted Meckel diverticulum, a condition where the diverticulum turns inward, is more common than previously thought. Characteristic imaging findings on barium, CT, and ultrasound aid in its diagnosis.
Area of Science:
- Gastroenterology
- Radiology
- Pathology
Background:
- Meckel diverticulum is a congenital anomaly of the small intestine.
- Inverted Meckel diverticulum is a rare presentation where the diverticulum prolapses into the bowel lumen.
Purpose of the Study:
- To define the clinical, radiologic, and pathologic features of inverted Meckel diverticulum.
- To assess the prevalence and diagnostic characteristics of this condition.
Main Methods:
- Retrospective review of 84 Meckel diverticulum cases.
- Analysis of 18 cases identified as inverted Meckel diverticulum.
- Correlation of surgical, barium, CT, and ultrasound findings with pathologic results.
Main Results:
- 18% of Meckel diverticula were inverted, often associated with small bowel intussusception.
- Symptomatic patients (median age 32) presented with subacute or chronic symptoms.
- Characteristic imaging findings included intraluminal masses on barium, specific attenuation patterns on CT, and target-like lesions on ultrasound.
Conclusions:
- Inverted Meckel diverticulum is more prevalent than previously recognized.
- Distinct radiologic findings on barium, CT, and ultrasound are associated with inverted Meckel diverticulum.
- Pathologic examination confirms mesenteric fat within the inverted sac.