Malignant melanotic nerve sheath tumor Radiology Reference Article Radiopaedia.org Intracranial metastatic melanoma Radiology Reference Article Radiopaedia.org Intracranial Metastatic Melanoma Metastatic Malignant Melanoma 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