I am very sorry for the loss of your sister. I agree that cancer is an insidious disease. It's hit my family very hard. My daddy's cancer was also Stage 1 at discovery. After surgery to remove the tumor he took chemo and radiation. He still lived less than a year. My Aunt was dignosed at Stage 4 and outlasted daddy by several years. So I know cancer doesn't follow rules.
I have yet to make sense of it all, but help me understand something if you can. You mentioned you can still get ovarian cancer even if your ovaries are removed. How is this?
removing the ovaries does not always guarantee women will not develop ovarian cancer. (Rarely, the cells that cause ovarian cancer can be present in the body even after the ovaries are removed)
My doctor said that just removing the ovaries may not be enough (in rare cases). She recommends a complete hysterectomy which is also removal of the uterus and fallopian tubes.
So sorry about your Dad and Aunt.