Radiation fields have historically encompassed the primary tumor as well as the regional lymphatics in the ipsilateral hilum and mediastinum. This elective treatment was based on the identified risk of occult lymph node involvement ranging up to 20% in some surgical series.16 In recent years, elimination of elective nodal irradiation, which is potentially poorly tolerated in this population,17 has been validated by several retrospective studies permitting treatment of the primary tumor alone with limited fields.18-21 Slotman, et. al., in a study from the Netherlands, reported the use of limited "postage-stamp" fields to treat early stage lung cancer patients using hypofractionated RT (i.e., 4,800 cGy in 400-cGy fractions). Reported 3-year overall and disease-specific survival rates were 42% and 76%, respectively.20