Sigmoid colon duplication with ectopic immature renal tissue in an adult: A case report

Figure 1 Abdomino-pelvic computed tomography showed a blind, dilated bowel loop filled with fecal material, directed to right upper quadrant of abdomen. A: Axial view; B: Coronal view.

Figure 2 Gastrografin colon study revealed a Y-shaped structure formed by the sigmoid colon and duplicated colonic segment.

Figure 3 Colonoscopy images. A: Bifurcation of the colonic lumen; B: The duplicated segment was filled with huge fecalomas.

Figure 4 During the laparoscopic examinatin, an about 30 cm long, tubular bowel segment originating from the mesenteric side of the sigmoid colon was identified. SC: Sigmoid colon; DS: Duplication segment.

Figure 5 Grossly, the duplicated segment, measuring 34 cm in length, was connected to the native sigmoid colon at the mesenteric side.

Figure 6 Microscopically, the duplication segment shows all 3 layers of bowel wall with scatted heterotopic tissue (Hematoxylin and eosin stain, ×12. 5).

Figure 7 The heterotopic tissue is consistent with ectopic immature renal tissue. A: Higher magnifications view (Hematoxylin and eosin stain, × 200); B: Immunohistochemical staining (× 200) for vimentin; C: Immunohistochemical staining (× 200) for CK7; D: Immunohistochemical staining (× 200) for PAX8.