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Updated: Feb 3, 2026

The WATCHMAN Left Atrial Appendage Closure Device for Atrial Fibrillation
Published on: February 28, 2012
Left atrial appendage mass
Po F Chan1, Theodoros Kofidis2,3, Kong B Tan3,4
1Department of Cardiology, Ng Teng Fong General Hospital, Singapore, Singapore.
Insights
Left atrial masses can cause embolization. A young woman
Area of Science:
- Cardiology
- Cardiac Surgery
Background:
- Left atrial (LA) masses are clinically significant due to their association with peripheral embolization.
- Accurate differentiation between thrombi and primary cardiac tumors is essential for appropriate management.
Observation:
- A young woman presented with a left atrial mass initially diagnosed as a thrombus and treated with anticoagulation.
- Echocardiographic review prompted re-evaluation of the initial diagnosis.
Findings:
- The left atrial mass was revised from a thrombus to a primary cardiac tumor.
- Surgical excision confirmed the mass as an atrial myxoma.
- The myxoma was found in an unusual anatomical location within the atrium.
Implications:
- This case highlights the importance of thorough echocardiographic assessment for diagnosing left atrial masses.
- Misdiagnosis can lead to suboptimal treatment, such as anticoagulation for a tumor.
- Recognition of atrial myxoma, even in atypical locations, is critical for surgical planning and patient outcomes.
Abstract:
Left atrial (LA) masses are known to be associated with peripheral embolization. Accurate identification of etiology is crucial because treatment strategies may differ. We present the case of a young woman, who was initially diagnosed with a LA thrombus and anticoagulated. The diagnosis was revised to a primary cardiac tumor after review of the echocardiographic findings. Surgical excision revealed an atrial myxoma in an unusual location.
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