A ground glass nodule 0.6 cm is not necessarily early lung cancer.
Glassy nodule is a kind of result in CT examination of lung, which is only a kind of manifestation of lung lesions, which may be caused by tuberculosis, inflammation, or lung cancer, and there is no way to judge the nature of a single glassy nodule 0.6 cm, which cannot be sure that it is lung cancer.
Moreover, the staging of lung cancer is according to TNM standard, which means that the tumor size, lymphatic metastasis and metastasis to distal organs should be considered. Only if it is determined by puncture biopsy that ground-glass nodule 0.6 cm is malignant, and there is no metastasis or spread of lymph nodes and distal organs, then it can be 100% certain that it is early stage lung cancer.