Papillary fibroelastomas are rare, primary, benign cardiac tumors most frequently located in the heart valves. They are a potential cause of systemic embolization and may be associated with myocardial ischaemia, transient ischaemic attacks, strokes, or sudden death. We describe the case of 75-year-old woman with diagnosed aortic insufficiency who was admitted to hospital with acute coronary syndrome. The fibroelastoma of the anterior mitral leaflet was diagnosed using transthoracic and transoesophageal echocardiography. We provide a differential diagnosis and review of the literature concerning the pathologic intracardiac masses affecting cardiac valves.