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Transthoracic long-axis view showing the cystic component of the mass (black arrows), which is moving into the left ventricle during diastole.
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During diastole, the cystic portion of the mass was moving into the left ventricle through the mitral orifice and mimicking mitral stenosis (Figure 1).
Cardiac magnetic resonance imaging revealed a left atrial mass (black arrows) extending directly into the left atrium through the pulmonary vein, which had a cystic component moving into the left ventricle (white arrows). LA: Left atrium, LV: Left ventricle, RA: Right atrium, RV: Right Ventricle.
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Cardiac magnetic resonance imaging (MRI) confirmed the presence of a tumoral mass rather than a thrombus (Figure 2).