Melanosis Coli Clinical Gastroenterology and Hepatology Melanosis coli: Symptoms, causes, treatment, and more 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 Classification of HES diagnoses using ICD 10 Download Scientific Diagram Pathology Outlines Melanosis coli