Pulmonary arteriovenous fistulas

What it means

A rare vascular anomaly with a direct communication between pulmonary artery and pulmonary vein without an intervening capillary bed.

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