OUTLINE: Induction: Patients receive oral etoposide daily on days 1-21 and vincristine IV on days 1, 8, and 15. Treatment repeats every 4 weeks for 2 courses. Patients receive radiotherapy daily for 6 weeks concurrently with induction chemotherapy. Maintenance: One week after induction therapy, patients receive vincristine IV on days 1 and 8 and oral etoposide daily on days 1-21. Treatment repeats every 4 weeks for 10 courses in the absence of disease progression or unacceptable toxicity. Patients are followed every 3 months for 2 years, every 6 months for 3 years, and then annually thereafter.