Hydatid cyst (HC) means cyst full of water is a parasitic disease caused by larval stage of Ecchinococcus Granulosus, characterized by cyst formation in the liver and lung, rarely in other parts of the body. To evaluate the indications, rate and outcome of resection in pulmonary HC, which is an important health problem in our country. This is a retrospective and prospective study of forty-patients with pulmonary HC, admitted and surgically treated at the thoracic and vascular surgery department in the Medical City Teaching Hospital, Baghdad, Iraq from 1 st of January 2011 till 1 st of July 2017. They underwent some sort of pulmonary resection.Twenty four of our patients were female (60%), while the remaining 16 patients were male (40%).The mean age was (25.375+\-15.775) day. The most common symptom was cough, seen in 29 patients (72.5%), hepatic involvement was seen in seven patients (17.5%), bilateral lung involvement seen in six patients (15%). The most affected lobe was Right lower lobe, seen in 16 patients (36%). Posterolateral Thoracotomy was the standard surgical approach, right thoracotomy was done in 22 patients (55%), left thoracotomy done in 16 patients (40%), staged bilateral Thoracotomy done in two patients (5%). The most common indication for resection was destroyed lobe seen in 16 patients (40%). The most common resection technique was lobectomy, done in 23 patients (57.5%) The morbidity rate was 27.5% and prolonged air leak and pneumothorax were the common complications .Mean duration of hospital stay around 9.625 days. No mortality or recurrence reported. The most common cause of resection in pulmonary HC was destroyed lobe, taking in consideration parenchymal preserving techniques as priority

No abstract