I couldn't write on your malignant meningioma post, so I am sending you a message here. You said she has a big meningioma but also dementia. Meningioma pressing on the brain can give the same simptoms as the dementia. My mom is 56 and the doctors thought she had dementia. She was repeating things after 10 seconds. The tumor was pressing on her right parietal lobe. Right after the operation the memory improved.
So it was defenetly from the tumor. You might want to check to have a neurologist see her, have a biopsy done and maybe gamma knife treatment.