I would add that, from my experience with lung cancer and my son’s lymphoma, a 2 nd opinion never does any harm and may be hugely useful.
After a suspicious nodule was seen on a CT scan in my left lung, the first oncologist I saw recommended waiting 3 months and then doing a 2nd scan to see if it had grown. It had barely grown, so she recommended doing another scan in 4 months. I consulted another lung cancer expert (a surgeon) at a different hospital. He said, “I’m 85% sure it’s cancer” and did a lobectomy shortly afterwards. The biopsy proved him right. (I couldn’t have a biopsy prior to surgery because the nodule was inaccessible). Waiting might not have changed anything, but I was happy to move quickly when it was only Stage 1A with no lymph gland involvement.