Malignant Peripheral Nerve Sheath Tumor grows in the soft tissues such as muscle, fat, tendons, ligaments, lymph and blood vessels, nerves, and other tissue that connects and supports the body. It also Malignant melanotic nerve sheath tumors in the spinal canal of psammomatous and non psammomatous type: Two case reports Metastatic Malignant Peripheral Nerve Sheath Tumor With NF1 Successfully Treated With 'Gradual Subtraction' ICE Chemotherapy Anticancer Research Malignant melanotic nerve sheath tumors in the spinal canal of psammomatous and non psammomatous type: Two case reports