Sydney crease

What it means

Extension of the proximal transverse crease (five finger crease) to the ulnar edge of the palm.

The proximal transverse (five finger) crease starts on the radial side of the hand near the base of the index finger and extends toward the ulnar side of the palm, but does not reach the ulnar side. In this finding, the crease extends completely to the ulnar margin of the palm.

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