TY - JOUR T1 - Cystic atrioventricular node tumour: not a mesothelioma JF - Journal of Clinical Pathology JO - J Clin Pathol SP - 1232 LP - 1232 VL - 58 IS - 11 AU - C A Evans AU - S K Suvarna Y1 - 2005/11/01 UR - http://jcp.bmj.com/content/58/11/1232.1.abstract N2 - Cystic tumours of the atrioventricular node (sometimes called “benign mesotheliomas of the atrioventricular node”) are rare lesions associated with sudden cardiac death.1,2 A recent case provided several informative points regarding the nature of this lesion and best practice methodology within the coroner’s necropsy. A 31 year old man, training for a marathon, collapsed and died suddenly without previous medical history. No system, including the heart, revealed pathology on macroscopic examination at necropsy. Toxicology and non-cardiac tissue histology were negative. However, tissue sampling of the cardiac conduction system revealed an 11 mm diameter cystic tumour of the atrioventricular node that blended into the nodal tissue and proximal His bundle (fig 1). Immunohistochemistry showed no reactivity with … ER -