My husband had a CT done yesterday and they found a small nodular density left lung base measuring 8-9 mm. It says that is likely benign. They recomend follow up CT in 6 months. What is that mean? Could it be cancer? Can we get a second opinion? What kind of doctor should we look for? Please, any advice? Can't wait for 6 months to find out what is going on, we are both very concern.