Skip to main content

A case of right atrial appendage aneurysm mimicking a pericardial cyst on echocardiogram


Right atrial appendage aneurysms (RAAAs) are rarely encountered. If symptomatic, they present with atrial arrhythmias or embolic events. Surgical resection is indicated for symptomatic patients. We describe a 65-year-old man presenting with palpitation for 6 months. Electrocardiogram showed atrial flutter. Transthoracic echocardiography revealed a large thin-walled cystic mass anterior to right ventricular outflow tract, which was confirmed to be a giant RAAA by contrast transoesophageal echocardiography and later by contrast-enhanced computerised tomography. The patient underwent electrocardioversion, following which he remained in sinus rhythm and was asymptomatic during the 3 months follow-up period.


  1. Aryal MR, Hakim FA, Giri S, Ghimire S, Pandit A, Bhandari Y, Acharya YP & Pradhan R 2014 Right atrial appendage aneurysm: a systematic review. Echocardiography 31 534–539. doi:10.1111/echo.12510

    Article  Google Scholar 

  2. Gulati A, Gheta R, Chan CF, Ismail NA, Sheppard MN, Kilner PJ & Magee AG 2011 Longitudinal follow-up of a right atrial appendage aneurysm by cardiac magnetic resonance imaging. Circulation 123 2289–2291. doi:10.1161/CIRCULATIONAHA.110.010363

    Article  Google Scholar 

  3. Cianciulli TF, Rubinetti ER, Saccheri MC, Dethinne SD & Prezioso HA 2010 Contrast echocardiography in the non-invasive diagnosis of giant aneurysm of the right atrial appendage. European Journal of Echocardiography 11 E26 doi:10.1093/ejechocard/jeq065

    PubMed  Google Scholar 

Download references

Author information

Authors and Affiliations


Corresponding author

Correspondence to Nader D. Nader MD PhD.

Rights and permissions

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Toufan, M., Pourafkari, L., Akbarzadeh, F. et al. A case of right atrial appendage aneurysm mimicking a pericardial cyst on echocardiogram. Echo Res Pract 1, K5–K8 (2014).

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: