A normal CT two years ago and a ground-glass nodule two years later may be caused by benign diseases such as pneumonia, tuberculosis, dust deposition, or malignant diseases such as lung cancer and metastatic lung cancer.
Milled glass nodule is a cloudy slightly dense shadow found on chest CT, which is an imaging manifestation of many benign and malignant lung diseases, and its malignant risk is related to the size, morphology and evolution of the nodule.
Ground glass nodules found on chest CT within two years may be caused by benign diseases such as pneumonia, tuberculosis, dust deposition, focal pulmonary fibrosis, etc., or malignant diseases such as bronchopulmonary carcinoma and metastatic lung cancer.
Ground-glass nodules are mostly benign, but if the size of the nodule is larger than 8mm, with rough edges, signs of lobulation, burr, pulling pleura, etc., and the size of the nodule changes markedly on regular review, and the solid component is increasing, then malignancy is more likely to be considered.
It is recommended that patients consult a specialist to determine the possible etiology of the disease based on the specific morphology and size of the nodule, as well as the results of other tests, such as tumor markers and inflammation indicators, and follow the doctor’s instructions for further examination and treatment.