Malignant Peripheral Nerve Sheath Tumor of The Orbital Region Arising from Pre Existing Benign Neurofibroma in An Adolescent Patient of Neurofibromatosis Type 1: A Case Report and Review of Literature European Journal Frontiers Case report: Brachial plexopathy caused by malignant peripheral nerve sheath tumor and review of the literature Surgical Treatment of Peripheral Neuropathic Pain, Peripheral Nerve Tumors, and Peripheral Nerve Injury Frontiers Research Topic A Rare Case of Epithelioid Malignant Peripheral Nerve Sheath Tumor Mimicking Malignant Melanoma Cureus