2. Patients with a solid lung lesion 2-5cm identified on chest CT that are surgical candidates with a high probability of cancer (>65%) will be referred for surgical evaluation. If the lesion is partially solid (ie there is a ground glass component) then the solid portion must make up >75% of the lesion and measure at 2-5cm. If the patient refuses surgery or if the surgeon requests a definitive diagnosis prior to surgery the patient will have the option to be included in this study. All sites will use the same online calculator to document probability of malignancy.