Concurrent Radiotherapy With Weekly Topotecan for Primary Treatment of Inoperable Localized Non-small Cell Lung Cancer

The starting dose for the first cohort will be 2 mg/m2/week. Increment between cohorts will be by 1 mg/m2/week if no toxicity related to topotecan occurs. All members of a dose cohort must have safely completed all radiotherapy and topotecan dosing prior to beginning enrollment in the next higher dose cohort. Increments will be reduced to 0.5 mg/m2 if mild to moderate toxicity occurs (grades 1 or 2). The escalation will continue until the maximum dose of 4 mg/m2/week is reached. Therefore the minimum number of dose levels (cohorts) is 3 to reach the goal of 4 mg/m2/week, and the maximum is 5.