Oh man, I hope he or she was okay. This is terrible. In most people in whom squamous cell carcinoma of the tongue gets caught early, it's curable. I'm in the group in whom it's caught relatively early, but the initial surgery and radiotherapy isn't enough.
Regarding attitude, I figure that there is much I can't control, but attitude is one I can. WWMAD? (Would would Marcus Aurelius Do?): https://jakeseliger.com/2023/09/18/stoic-philosophy-finding-...:
You’ll see stoic ideas threaded through the essays my wife and I have been writing about my fatal cancer diagnosis: “Every day I’m trying to make a good and generative day, and I remind myself that there are many things I can’t control, but, as both Frankl and the Stoics emphasize, I can control my attitude.”
One way to see the virtues of this attitude is by process of elimination: What’s the alternative? Wallowing in bad days in which I accomplish and achieve nothing important? Getting angry about things I can’t control, and things that will remain the same whether I’m angry about them or not? Lamenting that which cannot be, and will not be no matter how much I wish it so? Nothing will bring my tongue back. Bemoaning my fate will not avert it (though I’m also not passively accepting fate: as described below, I appear to be in a clinical trial for a novel, promising drug that targets squamous cell carcinoma of the tongue). The likelihood of another decade of life is not literally 0.0, but it’s under one percent and would require a series of near-miracles via clinical trials.