Abstrait

MDCT and CMR features of cystic tumour of atrioventricular node (CTAVN).

Onkar B Auti, Kishore Kumar, Naushad A Peeran, Vimal Raj

An asymptomatic 28-year-old woman in postpartum period was referred for cardiac evaluation due to incidentally detected complete heart block. Echocardiography revealed a hyper lucent mass in inter-atrial septum. A provisional diagnosis of right atrial myxoma was made and Cardiac Magnetic Resonance (CMR) imaging was recommended for further evaluation. CMR showed a non-mobile mass in the inferior inter-atrial septum which was hyper intense on T1W and delayed enhancement imaging. Multi detector computed tomography showed hyper dense lesion. Appearances were those of a cystic tumor of Atrioventricular Node (AV) node based on the history, location and appearances. Surgical excision was further recommended.

This case-report summaries the rare occurrence and imaging features of cystic tumor of AV node. It has significant morbidity and mortality. Surgical excision is treatment of choice; however in post-partum period treatment with GnRH may be useful.