Localized Hyperthermia and Radiation in Cancer Therapy

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Abstract
Clinical researches in hyperthermia have recently expanded rapidly with the increase in our knowledge of the biological effects of heat on experimental systems. This article provides background information on the biological rationale and current status of technologies concerning thermometry and heating equipment for the application of hyperthermia to human cancer treatment. Much data has been accumulated recently in hyperthermia treatment with and without radiation to superficial tumours which are refractory to conventional treatments. In this paper the treatment results published recently have been surveyed. The complete responses of tumours treated by heat alone are in the range of 15 per cent as opposed to approximately 60 per cent for the combination of heat plus radiation. Clinical results so far published have demonstrated that local control is consistently better in the lesions treated with radiation plus heat than with radiation alone. The morbidity related to heat therapy is within tolerable limits. Several articles on the clinical results of deep-seated tumours treated by hyperthermia are reviewed. Problems to be solved in the application of heat to cancer therapy are discussed.

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