Amelanotic Malignant Melanoma: A Case Report Cureus New Research Helps Identify Uveal Melanomas Most Likely to Spread to the Liver Inflammation lights the way to metastasis Nature 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 What Is Metastatic Melanoma and Where Can It Spread?