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English: Category B -
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Text: When the temperature level is increased to approximately 42 - 43 degrees C, the tumor releases heat shock proteins. These proteins give information to the immune system that cancer cells have developed. The immune system is now able to react and sends T-lymphocytes, who are killer cells which attack the tumor. The heat applied during the procedure improves blood circulation, making the tumor cells more receptive to radiation therapy, and destroying them efficiently and more rapidly.

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