Frontiers Case report: Melanosis coli combined with colon cancer, causality or coincidence? Pathology Outlines Melanosis coli Colonic melanosis due to excessive consumption of laxatives containing anthraquinone and senna : r MedicalGore Melanosis coli and colorectal cancer: Coincidence or correlated? ScienceDirect Brilliant Colonic Adenoma in Melanosis Coli Indian Journal of Surgery Springer Nature Link 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