1. Malignant Peripheral Nerve Sheath Tumors
Based upon available data regarding divergent differentiation in peripheral nerve sheath tumors, this is a unique, previously undescribed tumor demonstrating rhabdomyosarcomatous, primitive neuroectodermal tumor and scant epithelial...
http://www.thedoctorsdoctor.com/diseases/mpnst.htm

2. Neurofibrosarcoma (Peripheral Nerve Sheath Tumor) - My Child Has - Children's Hospital Boston
Neurofibrosarcoma, also known as peripheral nerve sheath tumor, is a malignant tumor that develops in the cells surrounding these peripheral nerves. Neurofibrosarcoma is considered a soft tissue sarcoma, cancer that originates in soft tissue...
http://www.childrenshospital.org/az/Site1086/mainpageS1086P0.html

3. World Journal of Surgical Oncology | Full text | Malignant peripheral nerve sheath tumors (MPNST)...
] These tumors often create diagnostic problems because of their cellular origin and histopathological similarities with other spindle cell sarcomas like monophasic synovial sarcoma, leiomyosarcoma and fibrosarcoma.
http://www.wjso.com/content/4/1/55