Cysteuze massa bij een jonge vrouw met atriumseptumdefect

<sec id="s1"><st>Clinical introduction</st> <p>A woman in her 30s was admitted to our hospital with palpitations and shortness of breath for 2 years. Auscultation revealed a grade 2&ndash;3/6 midsystolic murmur with a wide and fixed splitting S2. ECG indicated sinus tachycardia. Transthoracic echocardiography revealed a well-defined, fluid-filled, round cystic mass with a size of 40<FONT FACE="arial,helvetica">x</FONT>50 mm near the criss-cross atrioventricular connection (<cross-ref type="fig" refid="F1">figure 1A, B</cross-ref>), accompanied by a secundum atrial septal defect (ASD) with a diameter of 25 mm (<cross-ref type="fig" refid="F1">figure 1C</cross-ref>).</p> <p> <fig loc="float" id="F1"><no>Figure 1</no><caption><p>Transthoracic echocardiogram. (A) The cystic mass in the end-diastolic phase, (B) the cystic mass in the end-systolic phase and (C) the secundum atrial septal defect.</p> </caption> <link locator="heartjnl-2025-327116f01"></fig> </p></sec> <sec id="s2"><st>Questio