Ok my dad has severe COPD but has not had to have oxygen or anything. His shortness of breath has become more frequent in the past few months so he seen a lung specialist. The Dr. ordered a CT scan of the lungs. We call about the results today and the DR told us he had 2 nodules about the size of a pea that he was 95% sure were infected nodules and should go away on their own. He did schedule a followup scan in 3 months to make sure they do go away. I guess my questions is do they look different than cancerous nodules? How is he so sure? My Dad is 65 years old and smoked for 30 years- he quit 6 years ago. His family has a long history of cancer. Is three months ok to wait?