This was melanosis coli in a 75M with a long standing type 2 diabetes and chronic constipation in the form of heavily pigmented mucosa, resembling leopard skin, from the cecum through the ascending SciELO Brasil Prevalence of hepatitis C virus genotypes in the State of Par, Brazil Prevalence of hepatitis C virus genotypes in the State of Par, Brazil Melanosis Coli El Atlas Gastrointestinal gastrointestinalatlas.com This is a very rare case of metastatic oral mucosal melanoma to the colon with an unusual presentation mimicking melanosis coli. The colonoscopy findings show no mass effect but multiple hyperpigmented lesions Melanosis coli is a condition where the inner lining of the colon turns dark brown or black, usually due to long term use of certain laxatives #doctorsdiary #askdoc #doctorsofinstagram