Rapid neurologic deterioration

What it means

Loss of neurological function in a time frame that is considered relatively quick, for instance, loss of a develomental milestone or substantial exacerbation of neurological complications such as seizures or feeding difficulties within a few months.

Rare diseases that can present with this1

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