Pulmonary bleb

What it means

A bleb is a small gas-containing space within the visceral pleura or in the subpleural lung, not larger than 1 cm in diameter. CT findings show a bleb as a thin-walled cystic air space contiguous with the pleura.

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