" /> Cystic Tumor of the Atrioventricular Node - CISMeF





Preferred Label : Cystic Tumor of the Atrioventricular Node;

NCIt synonyms : Mesothelioma of Atrioventricular Node; Tawarian Node; Intracardiac Endodermal Heterotopia; Endodermal Rest; Benign Mesothelioma of Mahaim; Cystic Tumor of Atrioventricular Node;

NCIt related terms : Cystic tumor of atrio-ventricular node;

NCIt definition : A multicystic tumor arising in the inferior interatrial septum in the region of the atrioventricular node. The vast majority of patients present with complete heart block and a minority with partial heart block. Sudden death is reported in approximately 10% of the cases. It is a morphologically benign tumor composed of cuboidal, transitional, or squamoid cells. The cells may also show sebaceous differentiation and originate from the endoderm.;

Neoplastic status : Benign;

ICD-O code : 8454/0;

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19/08/2025


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