question: I had a chest CT in September 2013 which revealed a 7.5x7mm upper left lung nodule with some stippled calcifications. Dr recommended a repeat scan in 3 months. In December 2013 I had follow up CT which showed it had grown to 9mm with mild dependent atelectasis. Dr then said we would do another scan in 6 months. I am 29 years old and have smoked for 10+ years. I have pain in back and shoulder on left side which led me to the first scan. I also cough up phlegm daily. Dr doesn t seem too concerned based on my age. Is this likely benign (given the growth) or possibly cancerous? Should I push for a pet scan or just the usual ct in a few weeks?