@akfishinmom1- Subsolid nodules (SSNs) refer to pulmonary nodules with pure ground-glass nodules and part-solid ground-glass nodules. I have no idea how low-grade cancer cells are found because they look almost like regular cells. Since the report of the CT scan picked this up I imagine that your radiologist's training and experience led him to this result. Three months is often given as the time that cells can make changes that will show up on a CT scan, depending on the kind of cancer. After that, he might determine that a biopsy is recommended.