Epidemiology

• Peak incidence: 20’s
• M>F
• Increased incidence in Yemenite Jews

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Etiology

• xxx

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Physiology

• xx

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Pathology

• xxx

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Diagnosis

• CXR/Chest CT Pattern: round or oval (smooth/well-defined) mass or cyst
  • Location: lower-lobe predominance (most commonly in medial third of lung)
  • Calcification: occasional calcification in cyst contents (rarely in walls of cyst)
  • Cavitation: homogeneous until communicates with airway (usually due to infection), then may cavitate

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Clinical

• Infection of Cyst: occurs eventually in 75% of cases

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Treatment

– xx

References

• xxx