case_images: PMC9471420_01
case_images: The colonoscopy revealed a colon that was diffusely filled with dark brown pigmentation in a snakeskin-like pattern.
case_images: fsurg-09-973883-g001.jpg
case_images: PMC9471420_01_fsurg-09-973883-g001.jpg
case_images: F1
case_images: Her colonoscopy revealed that her colon was diffusely filled with dark brown pigmentation in a snakeskin-like pattern (Figure 1). There were also two polypoid masses located in the descending colon (Supplementary Figures S1A,B).
case_images: In the ileocecal region, a circumferential, irregular, ulcerative mass was found.
case_images: fsurg-09-973883-g002.jpg
case_images: PMC9471420_01_fsurg-09-973883-g002.jpg
case_images: F2
case_images: In the ileocecal region, a circumferential irregular ulcerative mass was found (Figure 2).
case_images: Biopsy of the dark brown intestinal mucosa showed that there were different degrees of macrophage deposition in the lamina propria interstitial cells of the colonic mucosa (white arrowhead), but the epithelial cell layer was normal.
case_images: fsurg-09-973883-g003.jpg
case_images: PMC9471420_01_fsurg-09-973883-g003.jpg
case_images: F3
case_images: Biopsy of the dark brown intestinal mucosa showed that there were different degrees of macrophage deposition in the lamina propria interstitial cells of the mucosa, but the epithelial cell layer was normal (Figure 3).
case_images: Patient's timeline of anthraquinone laxative use, colonoscopy findings, and treatment. MSS, microsatellite stability.
case_images: fsurg-09-973883-g004.jpg
case_images: PMC9471420_01_fsurg-09-973883-g004.jpg
case_images: F4
case_images: My quality of life has improved." Figure 4 indicates the clinical course of the patient.