Underdeveloped superior crus of antihelix

What it means

Decreased protrusion of the superior crus relative to the prominence of a normal antihelix stem.

This finding is highly variable. There may be an inverse relationship between the relative sizes of the superior and inferior crura, but these findings should be coded separately.

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

Also called: Hypoplastic superior crus of antihelix · Hypotrophic superior crus of antihelix