There is no way to tell if a 1cm ground glass nodule is benign.
This is because 1cm can only tell the size. Through the CT examination of the lungs, 1cm ground glass nodule is detected, it may be inflammation, tumor or tuberculosis, or it may be caused by the deposits produced in the lungs, etc. You should seek medical treatment as soon as possible, and arrange to have a lung puncture biopsy to check it in order to find out the nature of it in time.
A 1cm ground-glass nodule can be judged by its growth rate. Regular checkups, anti-infection treatment, and traditional Chinese medicine to see if the growth will be inhibited or disappear, and if the nodule gets bigger quickly and its shape changes, it means that it is malignant. In this case, immediate medical treatment should be sought to avoid the occurrence of deterioration.