Pathology Outlines Staging mucosal melanoma of the head & neck Melanotic macules of the tongue in a newborn Journal of the American Academy of Dermatology 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 Lentigo pathology Labial melanotic macule. B). Increased numbers of me lanocytes along Download Scientific Diagram