Malignant Melanotic Nerve Sheath Tumor of the Neck: A Case Report Applied Radiation Oncology Recurrent metastatic malignant peripheral nerve sheath tumor associated with neurofibromatosis I: a rare case with atypical immunohistochemistry Anais Brasileiros de Dermatologia Pathology Outlines Malignant melanotic nerve sheath tumor Malignant Peripheral Nerve Sheath Tumor of the Thigh Invading the Superficial Femoral Artery, with Necrotic Lung Metastases as Presenting Symptoms