It’s normal to be worried when a close blood relative is diagnosed. The good news is, the vast majority of CC cases are not hereditary. Hereditary CC is extremely rare. It’s also hard to prove and test for.
We discussed this topic before, many times. You can use Search function of the forum to find previous discussions. Click Search link in the green outline near the top of the page. Type ‘hereditary’ and click Search button. I found 42 posts.