“Black hole sign”
The left lower lobe bronchus does not reflect the light of the endoscope.
It appears with a central twilight, because the light is lost inside a cavity with which the bronchus is communicated.
“Black hole sign”
The left lower lobe bronchus does not reflect the light of the endoscope.
It appears with a central twilight, because the light is lost inside a cavity with which the bronchus is communicated.