[Pleuro-pericardial cyst in children]

We report the case of 3 1/2 year old child presenting a left pleuropericarditic cyst causing febrile cough and an opacity of the left lower lobe of the lung. We underline the importance of computed tomography of the thorax allows differential diagnosis with encysted effusion. Surgical treatment rarely indicated in pleuropericarditic cysts has stopped respiratory symptoms.