Frontiers Case report: Melanosis coli combined with colon cancer, causality or coincidence? Quantitative Analysis of Melanosis Coli Colonic Mucosa Using Textural Patterns Frequency Distribution of Hepatitis C Virus Genotypes with Reference to Age and Sex in Various Districts of Khyber Pakhtunkhwa, Pakistan European Medical Journal 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: A Case of Mistaken IdentityA Case Report The Permanente Journal A rare case of melanosis ilei of unclear etiology ScienceDirect