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I m not an expert by any means.
Your MRI was good?!
I would do CAT/PET every 6 months.
Not sure if health insurances cover more often. They do cover of you have symptoms. If you feel anything weird than you would ask for a scan. If you have headaches ask for an MRI.
CAT is the old version of CT scan. Basically, a CT scan measures the number and size of tumors. PET scan uses sugar uptake to show activity of the tumor as in necrotic (dead) or alive (active). When contemplating stopping treatment, they use PET scans. For brain and bone tumors, they prefer an MRI.
Hope this simple explaination is helpful.
I would think the doctors response for MRI would be you don’t have any Mets in your brain let’s do CAT/Pet unless you have some symptoms like headaches vision changes.
I m stage 3c and plan to start immunotherapy treatment. I had PET. My oncologist asked me if I have any headache or bones pain. He would offer MRI I think if had concerns. I would think.
I look at Positive lymph nodes as still metastatic disease rather than inflammation. I do understand what you mean though when we compare brain Mets and Positive lymph nodes. Brain tumors sounds terrifying.
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