F/up CT 1yr: This is a difficult request to provide an answer in this format. Subcentimeter nodules are rarely malignant. It is suggest that nodules of 4-6mm in size have a 0.8% risk of being malignant in one study to up to a 5% risk in another series. Risk factors,e.g. smoking,etc may alter the risk. It is generally felt that it would be wise to perform a follow-up CT scan in 1 year with a nodule 4-6mm.
Answered 11/20/2017
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