Whistling appearance

What it means

An abnormality of facial morphology characterized by a small mouth opening and constant contraction of the lips as if the patient were whistling.

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