Leah Finlayson from Addingham in West Yorkshire says she was "stunned" to be diagnosed with tongue cancer.
She is urging people to highlight any suspected symptoms with GPs and dentists to raise awareness of the disease.
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Former Police Inspector Harry White told the inquests that he was told that fans entering the terraces should "find their own level."
A former police inspector has told the inquests he realised fans entering through an exit gate would head towards already crowded pens.
The man is thought to have tied himself to the bottom of the vehicle as it travelled from Calais to Kent.