Pathology Outlines Melanoma Pigmented Lesions of the Oral Cavity Oral and Maxillofacial Surgery Clinics 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 Pathology Outlines Special site nevus Pigmented Lesions of the Oral Cavity Oral and Maxillofacial Surgery Clinics