Hyperpyrexia

What it means

An extreme elevation of core body temperature above normal defined as a rectal temperature of 41.1 degrees Celsius (106 degrees Fahrenheit).

Hyperpyrexia is considered a medical emergency and typically results in referral for emergency care.

Rare diseases that can present with this2

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category