What is the prognosis of someone with nsclc Stage 3 (adenocarcinoma) who went through 6 weeks of radiation and corresponding 6 weeks of chemo (carboplatin and taxol) without progression. His primary tumor at start was 7 cm x 6 cm. It shrunk to 5,7 cm x 5,7 cm at end of radiation and chemo. He was then placed on immunotherapy (Imfinzi) for 1 year with good results until now. He was off the Imfinzi for a year when progression occurred. His primary tumor went from 2.3 cm x 1.9 cm at PET scan on 7/2021 to 4.0 cm x 3.9 cm PET scan on 11/15. PET stated this is a 30% increase. They are going to rebiopsy it. What are they trying to accomplish by rebiopsy (with EBUS)? Please let us know his prognosis and reason for rebiopsy of primary tumor.