I was recently referred to a urologist due to my having blood in my urine during a routine exam. Today I had my CT scan and received the results. All seems well except for a 0.9cm cyst on my right kidney and a 0.5cm cyst on my left. But the thing that scares me is that they saw a Reticular opacity in the right lower lobe. The results said it likely represents localized infectious or inflammatory process. My heart is normal in size, without pericardial effusion. Here s my concern. I m a 46 year old smoker. I have smoked for the past 20 years (about a half pack a day). I have had a cough for the past 6 weeks. I cough green phlegm in the morning, then during the day I don t cough much, but at night it gets a little worse. It s actually gotten better than it was a few weeks ago. My question is, do reticular opacities lean more towards infections or do they point more towards a tumor considering my history?