| Health / Medical Topics |
Cystic Tumor of Atrioventricular Node
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. (NCI Thesaurus)
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