OUTLINE: This is a randomized, multicenter study. Patients are randomized to one of two treatment arms. Arm I: Patients receive vinorelbine IV over 20 minutes on day 1 and oral vinorelbine on day 8. Arm II: Patients receive oral vinorelbine on day 1 and vinorelbine IV over 20 minutes on day 8. Treatment continues in both arms in the absence of unacceptable toxicity or disease progression. Patients are followed for 28 days.