So I found out my Grandpa from my dad's side was diagnosed with stage 3 cancer in June. I don't talk to them so I don't really know all the information, but I heard that this cancer is hereditary. I am only 20, but I'm wondering if I should still get checked out anytime soon? If not, then for future reference, when should I consider getting checked for this? And what type of signs should someone look for with this cancer in their family?