case_images: PMC8214887_01
case_images: Timeline summarizing major events of the case.
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case_images: The patient has a surgical history of ovarian cyst removal (Figure 1).
case_images: X-ray gastrografin enema. Results showed ahaustral mucosal appearance of the sigmoid and descending colon (red arrows).
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case_images: At our institution, an X-ray gastrografin enema was performed, showing ahaustral mucosal appearance of the sigmoid and descending colon (Figure 2).
case_images: MRI defecography. Findings were suggestive of tricompartmental pelvic floor prolapse, moderate size anterior rectocele, and grade 2 sigmoidocele.
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case_images: MRI defecography was also done with findings suggestive of tricompartmental pelvic floor prolapse, moderate size anterior rectocele, and grade 2 sigmoidocele (Figure 3).
case_images: Gross examination of the sigmoid colon. A - Broad-based diverticulum is seen in the sigmoid colon likely presenting a tubular duplicated colon that shares a common opening with the sigmoid colon; B - Gross pathologic examination of the resected segment of the sigmoid colon shows a longitudinal outpouching located at 4.3 cm away from the closest resection margin, making a 30-degree angle with the sigmoid colon segment, and measuring 7.3 cm in length and 2.6 cm in average diameter (scale bar = 5 cm); C and D - The colon segment is opened to reveal tan pink mucosa with appropriate colonic mucosal folds in both the sigmoid colon and colonic duplication segments (scale bars = 5 cm).
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case_images: Microscopic examination using H&E stain. Histopathologic examination of the resected tubular colonic duplication demonstrates an intestinal wall containing all three layers (mucosa, submucosa, and serosa; true diverticulum) with well-formed smooth muscle layer (star) and mucosal lymphoid aggregates that extend to the submucosa (black arrows). Microscopic images were examined at 2.5x objective.
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case_images: On microscopic examination, the intestinal wall of the duplication contained all three layers (true diverticulum) with mucosal lymphoid aggregates that extended to the submucosa (Figure 5).