Malignant melanotic nerve sheath tumor with PRKAR1A, KMT2C and GNAQ mutations Intracranial metastatic melanoma Radiology Reference Article Radiopaedia.org Metastatic Malignant Melanoma 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 Metastatic Melanoma