Subcarinal air cyst

Subcarinal air cysts refer to small air cyst that can be detected on a CT scan. They are thought to represent small main bronchial diverticula although the former term is preferred 2. They may be associated with chronic airflow limitation.

Patients are asymptomatic and there are often seen on imaging for some other reason.

HRCT - CT chest 

They typically have a lobulated margin and can demonstrate ductlike communications between the air cyst and bronchi. Ductlike communications can arise from the posterointerior aspect of the proximal side of main bronchi; They can be either solitary or multiple. The larger subcarinal air cysts tends to be multiloculated.

If there are relevant clinical factors, consider

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Article information

rID: 25756
System: Chest
Tag: cases
Synonyms or Alternate Spellings:
  • Sub carinal air cysts
  • Subcarinal air cysts
  • Sub-carinal air cyst
  • Main bronchial diverticulum
  • Main bronchial diverticula

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