Frontiers Case report: A rare case of massive peripheral nerve melanotic schwannoma and review of the literature Improving our Understanding of the Management and Pathogenesis of Rare and Neglected Tumors of the Central and Peripheral Nervous System Frontiers Research Topic Malignant Melanotic Nerve Sheath Tumor of the Neck: A Case Report Applied Radiation Oncology Metastatic Melanoma of the Gallbladder ACS