Concurrent cisplatin-vindesine and hyperfractionated thoracic radiotherapy in locally advanced nonsmall cell lung cancer.

PURPOSE: Local failure is a major problem in locally advanced nonsmall cell lung cancer. The main objective of this Phase II trial was to test the feasibility of a combined concurrent radiotherapy and chemotherapy approach in an attempt to improve local control.

METHODS AND MATERIALS: From December 1989 to December 1992, 34 patients were included. The treatment schedule consisted of hyperfractionated radiotherapy (60 Gy in 48 fractions and 6 weeks with two daily sessions of 1.25 Gy), cisplatin (6 mg/m2 every day of radiotherapy), and vindesine (2.5 mg/m2 once weekly). After a 3-week rest period, two full cycles of cisplatin (120 mg/m2 on weeks 10 and 14) and vindesine (2.5 mg/m2 on weeks 11, 12, and 13) were given. Treatment evaluation with thoracic computed scan, bronchoscopy, and bronchial biopsies was performed 3 months after completion of radiation therapy. Failure rates were estimated using a competing risk approach.

RESULTS: The complete response rate was 50%. Local failure rates at 1 and 3 years were 53 and 56%, respectively. Distant metastases rates at 1 and 3 years were 26.5 and 29%. Overall survival rates at 1, 2, and 3 years were respectively 53, 33, and 12%. Severe esophagitis was observed in three patients (9%). Lethal toxicity was observed in two patients.

CONCLUSION: This Phase II trial confirms the feasibility of this type of approach with specific dose reduction and suggests that it may improve local control compared to conventional approaches.