4-5 finger cutaneous syndactyly

What it means

A soft tissue continuity in the anteroposterior axis between the fourth (ring) to the fifth (little) finger that extends distally to at least the level of the proximal interphalangeal joints.

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