Late onset metastatic melanoma arising from a medium sized congenital melanocytic naevus Indian Journal of Dermatology, Venereology and Leprology Weak Spot of Metastatic Melanoma Cells Identified Inside Precision Medicine Surgical Treatment of Peripheral Neuropathic Pain, Peripheral Nerve Tumors, and Peripheral Nerve Injury Frontiers Research Topic 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 An 84 year old man with a history of metastatic melanoma of the scalp who was undergoing immunotherapy presented with new, multiple blue gray macules on the scalp. Decoding Melanoma Metastasis