- Patients may not receive concurrent radiation therapy to the chest during cycles 1-3. Radiation therapy to disease in other areas of the body is permissible at any time, but such lesions will not be evaluable for response. Although patients who have received prior radiation to the chest are eligible, patients should be at least 4 weeks from prior radiation to the chest. Any chest lesion treated with radiation must have progressed to be considered measurable for this study.