Pathology Outlines Melanotic macule Pathology Outlines Atypical melanocytic proliferation Pathology Outlines Nevus spilus Labial Lentigo (labial melanotic macule) Cancer Therapy Advisor 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 Nevoid melanoma