The Entertainment Tonight correspondent and Hallmark Channel host took to Instagram on Tuesday to open up about his recent diagnosis with renal cancer.
On Wednesday, he shared more of his journey with ET's Kevin Frazier and Brooke Anderson, including how his family -- and two children -- have been by his side.
"It was tough to tell my kids... but man, I have just got such an incredible support system," revealed Mathison, who shares 16-year-old Lucas and 13-year-old Leila with his wife, Vanessa.
Mathison will spend a couple weeks in recovery, afterwhich he's hoping he'll be back to business as usual.
"I am extremely lucky that we found it early," he added, before explaining that he's got a surgery scheduled for Thursday, and he reached out to his friends and social media followers for some support.
"Vanessa, Lucas and Leila have been absolutely amazing with their love and support... as have my mom, dad, brother, and everyone at Home and Family , Hallmark, and ET."
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