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Mathison said post-surgery that doctors were able to completely remove the tumor, and he is now left with 80% of his right kidney. He added that he is \"so lucky\" that his medical team caught the tumor before it went into his lymph nodes, so he will not have to undergo chemotherapy or radiation.

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A post shared by Cameron Mathison (@cameronmathison) on Sep 13, 2019 at 5:17am PDT

The actor also spoke about how he had an inkling that something was off with his health leading up to discovering the tumor.

\"I have always been a healthy guy or been in touch with how I feel and what I eat -- how my body reacts -- and I really try to pay attention to my health, and, over the years, just certain things weren't right,\" he said.

\"I had seen several doctors -- both traditional and alternative medicine doctors. I had gotten a slew of tests showing low immune function, showing a low white B blood cell count -- things that didn't make sense to me considering I eat so healthy and am active,\" he added.

These thoughts led him to request an MRI in his gastrointestinal area, even though he said his doctors really did not think he needed it and advised other solutions. \"I got the MRI, and it probably saved my life,\" he said.

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A post shared by Cameron Mathison (@cameronmathison) on Sep 20, 2019 at 6:10am PDT

Mathison said he hopes people will learn to pay attention to their health and their bodies through his own story.

\"My message really is to pay attention, to be mindful, to listen to your body,\" he shared. \"When you eat a certain thing, or you feel a certain way, if it keeps going -- you know, get it checked out.\"

\"Go see your doctor, run the tests, which is what I did for years...really be your own best advocate for your own health,\" he added.

Mathison stars in \"The Christmas Club\" on the Hallmark Channel which premieres Wednesday, Nov. 27.

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