Anaphylactic Shock and ARDS Due to Pulmonary Hydatidosis

Perforation of hydatid cyst to pleural space or bronchi is an infrequent complication of hydatid cyst. the allergic reaction may occur after perforation cyst, but anaphylactic shock is rare. we report a 45-year-old man with a paroxysmal dyspnea, productive cough, fever and fatigue, respiratory rate 25 b/min and temperature 39?c. chest radiograph showed a cavitary lesion in its inferior lobe (fig. 1a). hydatid cyst serology was positive. three days after hospitalization, hypoxia and hypotension occurred.