I remember hearing about this about a year ago. Bryan Bresee, the Tigers all-everything DT who will certainly be a top pick when he enters the draft, had a 14 year old sister with brain cancer. They featured the story during a game early last season and I remember thinking to myself that that has got to be one of the most difficult things in the world to deal with. 

Unfortunately, Ella Bresee passed away from cancer at the age of 15. My prayers go out to Bryan and his entire family. There are much more important things in life than football. This is really sad to me. 

https://www.espn.com/college-football/story/_/id/34596490/clemson-tigers-dt-bryan-bresee-15-year-old-sister-dies-brain-cancer

(Mod Edit: deleted your dupe, Sloopy.)