TIL that in 1961, the only doctor at a Soviet research station in Antarctica got appendicitis, and had to performed surgery on himself to remove his appendix. Two weeks later he resumed regular duties

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The man who cut out his own appendix

https://www.bbc.com/news/magazine-32481442

Russian surgeon, Leonid Rogozov, got appendicitis while on an Antarctic mission - he had to operate on himself.