What is involved?
This is a multicenter study. Patients are stratified according to type of malignant peripheral nerve sheath tumor (MPNST) (sporadic MPNST vs neurofibromatosis type 1 [NF1]-associated MPNST). Patients receive 1 of 2 treatment regimens depending on the location of the MPNST and tumor response to chemotherapy.
- Chemotherapy and local control by radiotherapy and surgery: Patients receive doxorubicin hydrochloride and ifosfamide (IA) chemotherapy comprising doxorubicin hydrochloride IV over 15 minutes on days 1 and 2 and ifosfamide IV over 1 hour on days 1-5. Treatment repeats every 21 days for 2 courses in the absence of unacceptable toxicity. Patients then receive etoposide and ifosfamide (IE) chemotherapy comprising etoposide IV over 1 hour and ifosfamide IV over 1 hour on days 1-5. Treatment repeats every 21 days for 2 courses in the absence of disease progression or unacceptable toxicity. Patients also receive filgrastim (G-CSF) subcutaneously (SC) after each chemotherapy course beginning on day 6 or 7 and continuing until blood counts recover or pegfilgrastim SC once on day 6 or 7.
After recovery from chemotherapy, patients undergo radiotherapy and receive 2 more courses of IE during radiotherapy followed by 2 more courses of IA after completion of radiotherapy. Some patients may then undergo surgery.
- Chemotherapy and local control by surgery: Patients receive 2 courses of IA followed by 2 courses of IE as above. After recovery from chemotherapy, patients undergo surgery. After recovery from surgery, patients receive 2 more courses of IA followed by 2 more courses of IE in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed periodically for up to 5 years.