While conventionally fractionated radiation therapy has been utilized as nonsurgical therapy for these medically inoperable patients, close observation with no specific cancer therapy has also been advocated in highly selected cases. McGarry, et. al., reviewed outcomes in 75 patients who had received no specific cancer therapy for stage I NSCLC, and the cause of death was progressive cancer in 53% of cases with a median survival time of 14.2 ± 2.4 months.6