- IGV (ifosfamide, gemcitabine hydrochloride, and vinorelbine ditartrate): Patients receive IGV combination chemotherapy comprising ifosfamide IV on days 1-4, gemcitabine hydrochloride IV on days 1 and 4, and vinorelbine ditartrate IV on day 1. Treatment repeats every 2-3 weeks for 2-3 courses in the absence of disease progression or unacceptable toxicity.