HYPERTHERMIA

n. abnormally high body temperature

Hyperthermia in its advanced state referred to as heat stroke or sunstroke, is an acute condition which occurs when the body produces or absorbs more heat than it can dissipate. It is usually due to excessive exposure to heat. The heat-regulating mechanisms of the body eventually become overwhelmed and unable to effectively deal with the heat, and body temperature climbs uncontrollably. This is a medical emergency that requires immediate medical attention.
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Hyperthermia /hy·per·ther·mia/ hyperpyrexia; greatly increased body temperature.hyperther´malhyperther´mic malignant hyperthermia an autosomal [more]Hyperthermia - Community and Resources

Noun
1. abnormally high body temperature; sometimes induced (as in treating some forms of cancer)
(synonym) hyperthermy
(antonym) hypothermia
(hypernym) physiological state, physiological condition
(hyponym) hyperpyrexia

Treatment that involves heating a tumor.