Pigmented Lesions of the Oral Mucosa Pocket Dentistry PDF] Oral melanoacanthoma and oral melanotic macule: a report of 8 cases, review of the literature, and immunohistochemical analysis. Semantic Scholar Pathology Outlines Invasive melanoma Pathology Outlines Melanotic macule 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 Nevi general