C1-C2 subluxation

What it means

A partial dislocation of the atlantoaxial joints.

A subluxation affecting the intervertebral joint between the first and second cervical vertebrae.

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