Symmetric peripheral demyelination

What it means

A symmetric loss of myelin from the internode regions along myelinated nerve fibers of the peripheral nervous system.

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