Idiopathic Chylous Pericardial Effusion Due to Lymphatic Malformation of Mediastinum.

Chylopericardium can be due to a variety of secondary causes like trauma, radiation, tumors, following cardiac surgery, etc., or may be idiopathic due to abnormal lymphatic system and mediastinal lymphangiectasia, which is a rare entity. Here, we present a case of a 34-year-old previously healthy male presenting with idiopathic chylopericardium. 2D echocardiography revealed massive pericardial effusion without features of cardiac tamponade. Following pericardiocentesis, a CT scan of the thorax and MR lymphangiogram were done to arrive at a diagnosis of idiopathic chylopericardium. In addition to medical management, surgical treatment included partial pericardiectomy and sclerotherapy of the mediastinal lymphatic sac. The patient had an uneventful post-operative period.