Tumor necrosis by controlled ebullism.
In the early days of manned space flight, experiments were done in which dogs and chimpanzees were exposed to near vacuum in anticipation of possible manned space flight accidents. These specimens experienced what was termed "ebullism". This syndrome involved boiling of body fluids resulting in extreme dehydration and circulatory failure. Whereas malignant tumors are typically warmer than normal tissue, it should be possible to destroy them while sparing normal tissue through this phenomenon by subjecting patients to low pressure slightly greater than that which would produce systemic ebullism.
Babich
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D001831:Body Temperature; D006801:Humans; D009369:Neoplasms / Q000628:therapy*; D014618:Vacuum