Incidental: multiple bilateral sub 4 mm nodules, stable compared to the prior ct. small calcified granuloma in the left lower lobe. i did not have contrast. do i need follow up? how can they tell its not cancer and why do i have these?

More details would be helpful. Images and report may be uploaded during a virtual consult with Healthtap. From your description, a resolved infection is one likely condition to consider, including Coccidioidomycosis. If you have risk factors for lung cancer, blood marker testing may be helpful. Please follow up with your Pulmonary specialist. Watch for signs of shortness of breath and fever.