Who read the scans initially? I’m amazed at how often things get missed. My wife and I both have examples of things getting missed, fortunately they were both orthopedic issues and not cancer. First was my wife who had been having knee pain (she’s a runner) and got the all clear on an MRI. After it not going away, I sent the scan to a buddy that’s a pediatric radiologist and he took one look at it and saw a meniscus tear. She had surgery a week later. In my case, I tripped over a broken sidewalk while walking my dog in the dark. Had an x-ray the next day and got the all clear. Continued to have pain and couldn’t walk without a limp for six months when I finally made an appointment with an orthopedic surgeon. He took one look at the films and said he would have operated on me the next day after I had the original x-ray. Ended up having lisfranc surgery and I have an assortment of screws in my foot as a result.