Metastatic melanoma Stock Image C056 0518 Science Photo Library 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 Rare malignant melanotic nerve sheath tumors of the upper limb nerves: utility of high frequency ultrasonography in preoperative imaging Skeletal Radiology Springer Nature Link Generalized Melanosis in Metastatic Malignant Melanoma: The Possible Role of DOPAquinone Metabolites Semantic Scholar Intracranial metastatic melanoma Radiology Reference Article Radiopaedia.org Malignant melanotic nerve sheath tumor with PRKAR1A, KMT2C and GNAQ mutations