© Telif Hakkı 2020 Tüberküloz ve Toraks.Hydatid Cyst is a public health problem in Turkey. Although it can lead to cyst formation in all organs and systems, the most frequently affected organs are the liver and lungs. Here, we reported a 14-year-old girl who presented with low back pain and hydatid vomita symptoms and signs. The abdominal and thoracic CT examinations of the patient revealed that hydatid cyst found in the liver was opened to the inferior vena cava and it was determined that it caused multiple emboli in the right atrium, pulmonary arteries and lungs. Albendazole treatment was commenced and the hydatid cyst in the liver was excised by surgery, and surgery was planned for the hydatid cyst lesion in the right atrium. However, in the control thorax BT before the surgery, it was found that the cysts in the cardiovascular structures disappeared, causing widespread pulmonary embolism and spread to the entire pulmonary field. The most important complication of intense hydatid pulmonary embolization is the development of pulmonary hypertension and right heart failure. In our patient, pulmonary artery pressures and right heart functions were normal in repeated echocardiography. With this case, we wanted to emphasize that the cardiovascular involvement of hydatid cyst may not always require surgery.