Lentigo simplex Libre Pathology 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 Labial Lentigo (labial melanotic macule) Cancer Therapy Advisor Pathology Outlines Atypical melanocytic proliferation Pathology Outlines Common acquired nevus Pathology Outlines Atypical melanocytic proliferation