My farther was diagnosed in August with stage 3B non-small-cell adeno carcinoma. He went through 30-40 radiation treatments 5 days a week, and chemo once a week. He had his scans and met with his doctor today and they said NED no evidence of disease. What does this mean? How likely is this to reoccur again. Hes celebrating and im just scared hes going to be let down at his next scan in January. I know all of you are knowledgeable about this stuff any input would be helpful.