Endoscopic Imaging of Melanosis Coli Melanosis Coli: A Case of Mistaken IdentityA Case Report The Permanente Journal Melanosis Coli: A Case of Mistaken IdentityA Case Report The Permanente Journal 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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