Frontiers Cervical Malignant Melanotic Nerve Sheath Tumor with retained PRKAR1A expression and a clinically benign course: a case report and review of the literature A Rare Case of Epithelioid Malignant Peripheral Nerve Sheath Tumor Mimicking Malignant Melanoma Cureus Frontiers Case report: A rare case of massive peripheral nerve melanotic schwannoma and review of the literature Fungating malignant peripheral nerve sheath tumor arising from a slow growing mass in the forearm: a case report and review of the literature Journal of Medical Case Reports Springer Nature Link