OUTLINE: This is a randomized, multicenter study. Patients are stratified according to location of metastases (unilateral vs bilateral). Patients are randomized to 1 of 2 treatment arms. Arm I: Patients are assigned to regimen A or B. Regimen A: Patients receive high-dose doxorubicin IV and ifosfamide IV continuously on day 1 and filgrastim (G-CSF) subcutaneously on days 3-13. Regimen B: Patients receive chemotherapy as above without G-CSF. Treatment on both regimens continues every 3 weeks for 3 courses. Patients then undergo radical pulmonary metastasectomy via thoracotomy or sternotomy with wedge resection or lobectomy. Patients with responding disease after metastasectomy receive 2 additional courses on the regimen to which they were originally assigned. Arm II: Patients undergo radical pulmonary metastasectomy as in arm I. Patients are followed every 3 months for 2 years, every 6 months for 2 years, and then annually thereafter.