Dr. West and other's here have made the point for a long time that lung cancers with ggo's (pure and mixed), or what some people called BAC in the past, is often over treated. The results of a long term study about this issue have been published, confirming this view.
"ACTIVE SURVEILLANCE OF LUNG SUBSOLID NODULES REDUCES UNNECESSARY SURGERY AND OVERTREATMENT"
It's a summary that links to a medical paper which was just accepted for publication in the Journal of Thoracic Oncology:
"Long-term Active Surveillance of Screening Detected Subsolid Nodules is a Safe Strategy to Reduce Overtreatment "
The upshot is that having pure or mixed ggo nodules ups the risk for lung cancer appearing elsewhere in the lungs. On the other hand these nodules can be safely watched for a decade or more without requiring surgery or any other intervention in almost all cases.
"In conclusion, the majority of subjects with SSN who were diagnosed with lung cancer in the MILD cohort had developed a cancer elsewhere in the lungs. Lung cancers that arose from the SSN never represented the cause of death within the nearly 10-year follow-up period. Therefore, SSN can be considered a biomarker of cancer risk, and should be managed by active surveillance until signs of growth of the solid component. "