A para aortic malignant melanotic nerve sheath tumor mimicking a gastrointestinal stromal tumor: a rare case report and review of literature BMC Surgery Springer Nature Link 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 Peripheral nerve tumors Symptoms and causes Mayo Clinic Malignant peripheral nerve sheath tumor Wikipedia 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