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E1696. Meckel's Diverticulum: Make Full Use of CT to Identify It
Authors
  1. Ziman Xiong; Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology
  2. Yaqi Shen; Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology
Background
The purpose of this exhibit is: 1. To review the anatomy and embryology of Meckel's diverticulum 2. To discuss the manifestation of common complications of Meckel's diverticulum on Computed Tomography (CT) images. 3. To explain the application of CT in asymptomatic patients with unfilled intestinal cavity during scanning.

Educational Goals / Teaching Points
1. Anatomical and embryological basis of Meckel's diverticulum 2. Common complications and CT findings - Hemorrhage - Diverticulitis or perforation - Obstruction - Intussusception - Neoplasms 3. CT recognition of asymptomatic patients with poor intestinal filling 4. Sample cases and mimics

Key Anatomic/Physiologic Issues and Imaging Findings/Techniques
Imaging Findings: 1. The appearance of Meckel’s diverticulum on CT is varied depending on the complication. 2. In symptomatic patients, the lesions were most easily recognized when combined with hemorrhage, manifested as high-density shadows in local intestinal lumen. 3. Local intestinal tube thickening and density increase could be seen when combined with inflammation. 4. Typical signs of intestinal obstruction could be observed when obstruction happens. 5. When it is combined with intussusception, a central fat density surrounded by a thick collar of soft tissue could be seen. 6. In patients with asymptomatic or poorly filled Meckel’s diverticulum, lesions are sometimes difficult to detect, and CT may show local intestinal cavity filling.

Conclusion
1. Familiarity with the radiological signs of complications caused by Meckel’s diverticulum is critical to the timely detection and control of the patient’s condition. 2. CT is of great value in the diagnosis of symptomatic Meckel’s diverticulum, especially in patients with concurrent hemorrhage. 3. CT can assist in the identification of asymptomatic or poorly filled Meckel’s diverticulum and aid in the monitoring of the lesion during follow-up.