Melanosis coli on Colonoscopy - Benign finding on colonoscopy - Ask about senna (anthranoid) use - Lipofuscin pigment (not melanin) - black macrophages in lamina propria - Proximal colon - Grades 1-3 π - Associated with: TI ulcers, β adenomas #Melanosis #coli #Colonoscopy #clinical #gastroenterology