Ileal duplication mimicking intestinal intussusception: A congenital condition rarely reported in adult

Figure 1 Computed tomography enterography scan. A: Transverse view showed suspicious ileal intussusception (white arrow) in the right lower quadrant; B: Coronal view revealed a similar result (white arrow).

Figure 2 Tc-99m pertechnetate scintigraphy. A cluster of stripy abnormal radio-activity was located in the right lower quadrant.

Figure 3 Exploratory laparotomy findings. A: A 25-cm duplicating, tubular small intestinal segment was found arising from the ileal mesenteric margin; B: This duplication cyst was intimately attached to the native ileal segment located 15 cm proximal to ileocecal valve; C: this cyst had a blind end proximally and a completely patent orifice into the native ileal lumen distally.

Figure 4 Gross and histological pathology of the resection specimen. A: The resection specimen showed no signs of inflammation, infection, ulceration, hemorrhage, obstruction, or malignant transformation; B: The mucosal layer of the duplication cyst was lined with both small intestinal and gastric mucosae; C: Histology revealed that the duplication cyst was lined with ileal mucus glands and heterotopic gastric mucosae (hematoxylin-eosin, × 100).