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A 22-year-old woman presented with a 4-month history of dyspnoea on exertion and palpitations. She was in New York Heart Association class II at presentation. She had no history of fever, joint pains or rash. On examination, she had a grade II pansystolic murmur at the apex and an early diastolic murmur at the aortic area. Laboratory investigations revealed anti-streptolysin O titre of <200 units with normal erythrocyte sedimentation rate and C reactive protein levels. On two-dimensional echocardiographic examination, the mitral valve showed mild leaflet thickening with a mobile globular cystic structure with no internal echoes (figure 1), attached to the posterior mitral leaflet, producing moderate mitral regurgitation (figure 1). The aortic valve showed leaflet thickening and retraction leading to severe aortic regurgitation. Three-dimensional echocardiographic en-face views of the mitral valve from left atrial (figure 2A, online Supplementary video 1) and left ventricular aspects (figure 2B, online Supplementary video 2) clearly defined the globular structure attached to the P-2 and P-3 scallops of the mitral valve with a broad base near the posteromedial commissure. Based on the above findings, a diagnosis of rheumatic heart disease (RHD) with severe aortic regurgitation and moderate mitral regurgitation with a blood cyst of the mitral valve was made. Blood cysts are congenital benign lesions that generally regress with age1 and hence are rarely seen in adults.2 Their coexistence with RHD has seldom been reported. The patient successfully underwent a double valve replacement.
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Contributors All the authors have contributed significantly towards generation of this report and meet the criteria for authorship.
Competing interests None declared.
Provenance and peer review Not commissioned; internally peer reviewed.