Did you tell your parent(s) about your diagnosis?

My surgery is scheduled and I am prepared. I have not told my mother that's in her mid 90s that I have Prostate Cancer or that I'm having surgery. My mother is a worry wart and gets obsessed easily over things that she has no control over. She's also hyper observant about my physical health in general. Have you lost/gained weight are you getting enough fiber/calcium/vitamin A-Z. I don't want to tell her that I have Prostate Cancer because she will obsess. I also don't want her at the hospital after surgery because she will want/need to look at the surgery results. I don't want my mother looking at the "franks and beans" So here's my questions. For those of us that have elderly parents, did you tell them? I want to establish boundaries with my mother but I also don't want her to make me into "Norman Bates"/ Mama's boy.