CTICasesRuptured Pulmonary Hydatid Cyst
Imaging findings
A 41-year-old from Peru has a large complex cystic mass within the right lung with a rind of compressed lung and a small adjacent pleural effusion. He later presented in respiratory distress with chest pain after the hydatid cyst ruptured, shown by a collapsed internal membrane and a hydropneumothorax with mediastinal shift and overinflation of the right pleural space, with membrane debris in the pleural space.
Key takeaways
Pulmonary hydatid (echinococcal) disease should be considered for a complex cystic lung mass in patients from endemic regions, and rupture is a recognized acute complication producing a hydropneumothorax with a collapsed cyst membrane and can cause acute respiratory distress with mediastinal shift. Recognizing the collapsed membrane within the cavity and pleural membrane debris identifies the ruptured hydatid cyst.
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