Category 4A nodule – Follow-up LDCT after 3 months
A nodule is seen in the superior segment of the right lower lobe,
measuring approximately 16 X 12 mm in the maximum transverse
dimensions. The average diameter is therefore 14 mm. The measurements
has to be on the lung window images.
As per the Lung-RADS criteria – this nodule falls in the Catergory 4A
and as per the guidelines, a follow up LDCT (Low Dose CT) study should
be advised after 3 months as there is 5-15% probability of malignancy
in such nodules. Further management will depend on the temporal
evolution seen on the follow-up scan.
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