Pigmented Lesions of the Oral Cavity Oral and Maxillofacial Surgery Clinics 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 a Melanotic macule at the wetdry line of the lower lip. b Melanotic Download Scientific Diagram Labial Lentigo (labial melanotic macule) Cancer Therapy Advisor