A rare disease where your muscles turn into bone.

A rare disease where muscles turn into bone.

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Osteochondrodysplasia is a rare mutation where muscles start turning into bone.

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FYI, there's also a disease where your whole body petrifies... If you sweat, it turns into calcification, and your entire body hardens like a rock until you can't even move. There was a case in Korea too; it's a globally rare disease.