I have a ground glass lesion, and the Oncology Dr (specializes in Nodules!!) said biopsy is impossible as they are lacey along the edges and hard to get tissue from. They are watching it; I return in June. The followup PET scan showed an axillary lymph node issue, though, and not the lesion. I had the lymph node "punch" biopsied a couple months ago but now the Dr wants an excision biopsy where they remove it. I have to arrange with the GP. Having another followup thyroid CT.