congenital polycystic tumor of the atrioventricular node
CPTAVN
Congenital polycystic tumor of the atrioventricular node is a rare tumor of disputed histogenesis. It constant location in the atrioventricular node separates it from other cardiac cysts and tumors of indisputable endodermal origin.
Morphologic and histochemical features of the tumor fail to conclusively favor either a mesothelial or an endodermal genesis.
References
Travers H. Congenital polycystic tumor of the atrioventricular node: possible familial occurrence and critical review of reported cases with special emphasis on histogenesis. Hum Pathol. 1982 Jan;13(1):25-35. PMID: 7076192