After the immune system destroys melanoma tumors, visible melanin can be left behind. We tracked tumoral melanosis in a case series of patients on immunotherapy and offer suggestions for how to monitor 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. What is Metastatic Melanoma? Forefront Dermatology Metastatic melanoma Eruptive melanocytic nevi heralding the diagnosis of metastatic malignant melanoma: A case report ScienceDirect Malignant melanotic nerve sheath tumors in the spinal canal of psammomatous and non psammomatous type: Two case reports