First of all, I am assuming, since you didn't mention it, that your mother didn't break her hip after falling. What a blessing. From my understanding calcified meningiomas are a positive sign that the lesion is slow growing. I am not a doctor but at the age of 88 memory loss, hearing problems, and personality changes can be age related and not necessarily correlated with the calcified meningioma. I don't know if by "non-surgical options" you are referring to stereotactic radiation but if it were my mom I'd let sleeping dogs lie. (To quote an oft used idiom.) What does her doctor suggest?