Pathology Outlines Mucosal melanoma (genital, oral, sinonasal) Pathology Outlines Special site nevus Photomicrographs showing infiltration of malignant melanocytes into the Download Scientific Diagram Pathology Outlines Nevi general 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 Pigmented Lesions of the Oral Cavity Oral and Maxillofacial Surgery Clinics