[Agenesis of the left pericardium: report of a case].

We report a case of left pericardial agenesia in a 44 year old woman. Clinical picture was not specific on clinical field: atypical chest pain, asthenia, syncope, cystolic murmur 1/6 Levine on the second left interspace were found. ECG showed clockwise deviation of axis in the precordial leads and incomplete right bundle branch block. Chest X-ray showed marked levocardia and dilatation of pulmonary trunk. Levocardia increased with the patient on the left side. Echocardiography (possible only with patient recumbent on his right side) was normal. Magnetic resonance imaging showed absence of the left pericardium. We analyse the diagnostic problems and the prognostic doubts of this rare congenital anomaly.