Abstract
A ground glass opacity (GGO) is a radiographic finding defined as hazy, increased attenuation of the lung with preservation of bronchial vascular margin. A subsolid nodule (SSN) includes pure ground glass nodules and partsolid nodules in which both solid and ground glass components are present. These nodules are nowadays more commonly found with the introduction of CT screening programs. The optimal management of patients with SSN is of growing clinical concern. The newly1 introduced adenocarcinoma classification makes a clear distinction between pre-invasive lesions (atypical adenomatous hyperplasia), adenocarcinoma in situ (AIS: ≤ 3cm pure lepidic growth without invasion), minimally invasive adenocarcinoma (MIA: ≤ 3cm lepidic growth with ≤ 5mm invasion) and invasive adenocarcinoma (IA) of different subtypes.
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