My nodule was 1cm discovered on a CT Scan with Cardiologist. Was referred to Pulmonologist who decided it best to watch it for one year to see if there was any change (scans every 3 months). After second scan I decided to go to UCLA (CA) for a second opinion and they recommended needle biopsy, which I did and it was adenocarcinoma. Lower left lobe on the outer side of lung. Had lobectomy one month later. Good news is caught early and no chemo needed after surgery. UCLA is known to be aggressive and I am thankful for it! The hardest part is not knowing. Please get a second opinion. May I add that my husband, a long time smoker, has a 1.2cm nodule that they have been watching for two years (scans every 6 months) and it has not changed so they do NOT suspect cancer. They will continue with annual scans now. My very best to you for a positive outcome!