Rare malignant melanotic nerve sheath tumors of the upper limb nerves: utility of high frequency ultrasonography in preoperative imaging Skeletal Radiology Springer Nature Link Molecular and Clinical Oncology Malignant Peripheral Nerve Sheath Tumor (MPNST) Frontiers Case Report: Anlotinib combined with radiotherapy achieves sustained disease control in advanced malignant melanotic nerve sheath tumor Malignant peripheral nerve sheath tumor: models, biology, and translation Oncogene Malignant Melanotic Nerve Sheath Tumor of the Neck: A Case Report Applied Radiation Oncology