Giant left atrial myxoma causing mitral regurgitation through annulus dilatation

Key Clinical Message Giant left atrial myxoma causing mitral regurgitation through mitral annulus dilatation without affecting leaflet function is rarely reported. Abstract This is a case of a 37‐year‐old man suffering from worsening exertional dyspnea detected left atrial myxoma 92 × 43 mm. Radical mass resection and mitral annuloplasty were performed simultaneously. Giant left atrial myxoma causing mitral regurgitation through mitral annulus dilatation without affecting leaflet function is rarely reported.