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Heart. 2000 April; 83(4): e6.
PMCID: PMC1729374

Cystic tumour of the atrioventricular nodal region: report of a case successfully treated with surgery


A case is reported of a 59 year old woman who presented with palpitations. Electrocardiographic studies revealed atrial fibrillation and atrioventricular block. Echocardiography and magnetic resonance imaging showed a right atrial cystic mass attached to the interatrial septum. The patient underwent surgical excision of the mass. Histopathological findings were of a cystic tumour of the atrioventricular nodal region. This is the second report of this condition diagnosed antemortem and treated successfully with surgical excision.

Keywords: atrioventricular block; cystic tumour; excision

Figure 1
Magnetic resonance imaging of the thorax showing the tumour arising from the right side of the interatrial septum.
Figure 2
Photomicrograph of the cyst wall showing the large cyst lining of simple cuboidal epithelium (arrow) and within the fibrous wall of the large cyst, smaller cysts lined by similar simple cuboidal epithelium, and containing hyaline eosinophilic material ...

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