Ruptured hydatid cyst of lung.

We report a case of 26 year old woman who had ruptured hydatid cyst of the right lung. The chest radiograph and CT features were suggestive of a ruptured hydatid cyst with detached and collapsed endocyst within the exocyst. Intraoperatively communication between cyst and bronchus could be demonstrated. Interesting CT appearance and demonstrable communication of cyst with bronchus is the reason for this case report.