Melanotic Macules, Naevi, and Melanoma Springer Nature Link Benign Discoloration Poses Questions fig1.png Melanosis coli is dark brown black pigmentation of colorectal mucosa associated with chronic use of laxatives containing anthraquinone. Examples of such laxatives include senna and rhubarb derivatives. Clinical Importance: There is no association
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melanotic mucosa Pigmented Lesions of the Oral Mucosa