Fig. 1

Transthoracic echocardiography. a, parasternal long-axis view shows a round mass (6 × 5 mm, arrow) on the aortic side of the non-coronary cusp of the aortic valve in 2010. b, parasternal long-axis view shows a round mass (6 × 5 mm, arrow) on the aortic side of the non-coronary cusp of the aortic valve in 2015. c, parasternal short-axis view shows a round mass (arrow) on the aortic side of the non-coronary cusp of the aortic valve in 2015. d, Apical 4 chamber view shows moderate mitral regurgitation