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case_images: Colonoscopy findings in the ascending colon after administration of senna laxatives for 5 years. Colonoscopy findings revealed a brown and grey pigmented appearance throughout the colon, which was diagnosed as melanosis coli Grade II in the ascending colon.
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case_images: She underwent colonoscopy for further examination of constipation, a colonoscopy showed a sessile polyp in the sigmoid colon and revealed a brown and grey pigmented appearance throughout the colon, which was diagnosed as melanosis coli (Figure 1).
case_images: Colonoscopy findings in the ascending colon with continued administration of senna laxatives one year after the first colonoscopy. Melanosis coli Grade II was observed in the ascending colon.
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case_images: One year later, when the patient underwent colonoscopy for surveillance after colon polypectomy, colonoscopy findings showed that Grade II melanosis coli remained in the rectum, sigmoid colon, descending colon, ascending colon and cecum (Figure 2), and Grade III melanosis coli was present in the transverse colon.
case_images: Colonoscopy findings in the ascending colon 7 months after discontinuation of senna laxatives. Seven months after discontinuation of senna laxatives, colonoscopy revealed disappearance of melanosis coli.
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case_images: Seven months after cessation of senna laxatives, colonoscopy revealed that melanosis coli had disappeared in the rectum, sigmoid colon, descending colon, transverse colon, ascending colon and cecum (Figure 3).