United Kingdom, April 5 -- Teddi Mellencamp is determined to "beat" cancer.

The 43-year-old TV star - who has been diagnosed with Stage 4 melanoma, and recently had tumours removed from her brain and lungs - made the comment in response to a message from one of her Instagram followers, who observed that Stage 4 "is terminal especially with metastasis".

The Instagram follower added: "Praying that Teddi heals and is an outlier."

Teddi subsequently admitted to being saddened by the comments, describing it as "heart-breaking" to read.

Teddi replied: "These kind of comments make me really sad. I know people are trying to help but heart breaking for me to read. (sic)"

The reality TV star - who has Slate, 12, Cruz, ten, and Dove, five, with...