Mesothelioma of the atrioventricular node.
D000293:Adolescent; D005260:Female; D006329:Heart Conduction System; D006338:Heart Neoplasms / Q000150:complications / Q000473:pathology*; D006345:Heart Septal Defects, Ventricular / Q000150:complications; D006801:Humans; D008654:Mesothelioma / Q000150:complications / Q000473:pathology*; D009206:Myocardium / Q000473:pathology