You don’t really fully appreciate being in good health until your back is sore or you can’t breathe through your nose. Sometimes, it’s good to have a bit of a refresher course on just how lucky those of us without medical issues truly are. Here are eight outlandish medical cases from recent history that are guaranteed to instill a healthy existential dread into you. When you’re a child, its normal for teeth to come and go. What’s not normal is for those teeth to be outside of your mouth. In 2014, doctors discovered a tumor in the brain of a 4-year-old boy from Maryland. They managed to remove the unwelcome growth, but when they sliced it open they discovered a gruesome surprise – the tumor contained multiple fully formed teeth. The boy suffered from a rare brain tumor called craniopharyngioma. Doctors had for the longest time suspected that these growths formed from the same cells that create teeth, but before this they had never seen a tumor with actual teeth. [Plus 7 other strange cases].