<Tr> <Td> Hyperpyrexia </Td> <Td>> 40.0 or 41.0 ° C (104.0 or 105.8 ° F) </Td> </Tr> <Tr> <Td> Note: The difference between fever and hyperthermia is the underlying mechanism . Different sources have different cut - offs for fever, hyperthermia and hyperpyrexia . </Td> </Tr> <Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul>

What type of body temperature remains relatively constant