Purpose or Case Report: Meckel’s diverticulum is the most common congenital anomaly involving the omphalomesenteric duct. While patients may be asymptomatic, the clinical manifestations of Meckel’s diverticulum can be nonspecific, and the entity may be discovered only after the onset of complications. The purpose of this exhibit is to characterize the imaging manifestations of the different omphalomesenteric duct anomalies, with a focus on Meckel’s diverticulum, and describe their complications.
Methods & Materials: A brief overview of the relevant embryology of omphalomesenteric duct formation and involution will be provided. The imaging appearance of omphalomesenteric duct anomalies will then be discussed, followed by a pictorial review of its various complications. This will be presented utilizing a multimodality approach, including plain radiography, fluoroscopy, ultrasound, CT, and nuclear medicine. Gross surgical specimens will also be included when applicable.
Results: Examples of complications that will be discussed include Meckel’s diverticulitis, small bowel obstruction, volvulus, intussusception, and perforation. Additionally, an unusual case of a patent omphalomesenteric duct causing small bowel intussusception into an omphalocele will also be shown. Potential pitfalls and mimics will also be discussed.
Conclusions: Overall, omphalomesenteric duct abnormalities can present in a variety of ways, and early diagnosis by the radiologist is instrumental in facilitating prompt clinical management and preventing complications.