@joycegray1940, maybe I can help a bit with the terms. GGOs, or ground glass opacities, are regions of light-colored patches that show up on a CT scan. Multiple conditions can cause them, including pneumonia, Covid, lung cancer, and others. In your case, they are known to be a radiological artifact of mucinous lung cancer.

The lobulated lesion is a nodule that looks like it has lobes. It's small and has grown about 30% in 3 years. That's really slow. I've had nodules (or nodes or lesions) that grew by 50% in 3 months and turned out to be benign. Your doctor will stay aware of them and see what they look like after your next CT scan.

Medicine is all about balancing risks. What's the risk if you stop taking Tabrecta vs. what's the risk if you don't stop? You can always ask your doctor why he or she is making their decision. Some people don't want the details, so you have to ask if you want to hear them. And you can ask how long he wants you to be on Tabrecta. He may plan to have you on it for a while and see if your lungs clear up a bit. Write down your questions when you think of them. It's the only way to remember when you're talking with your doctor. And do you have someone to go with you? I'm still in my 60s and I have my wife come with me. Sometimes, she remembers things the doctor told me that I don't.

I hope these comments help you a bit.