Not the tumor itself: Your optic nerve tumor itself should have no effect on cognition or memory, unless it has become so large that it is pressing on the hippocampus or entorhinal cortex. Depending on how it was treated, though, surgery, radiation and chemotherapy can affect both memory and cognition. Talk to your doctor about your concerns. They can do a PET scan which shows functional changes in areas of your brain
Answered 5/18/2020
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