Frontiers Case report: A rare case of massive peripheral nerve melanotic schwannoma and review of the literature Splenic Solitary Metastasis From Melanoma Malignum: A Case Report Cureus Improving our Understanding of the Management and Pathogenesis of Rare and Neglected Tumors of the Central and Peripheral Nervous System Frontiers Research Topic Pathology Outlines Malignant melanotic nerve sheath tumor