35 and above, pure ground glass nodule, single nodule, < 6 mm.

ACR Fleischner Society recommendations (MacMahon, et al. Radiology 2017; 284(1): 228-43) suggest the following: No need for routine follow-up. However, if the nodule has suspicious morphology or if the patient belongs to higher risk population group such as the Asians, consider follow-up chest CT at 2 and 4 years.