LEGENDS
Fig. 1: A) Transthoracic 2-D Echocardiographic four chamber view, in a 61-year-old
asymptomatic man showing the intracardiac mass (asterisk ) attached to the anterior
mitral leaflet (AML) and B) moderate mitral regurgitation.
LA= Left atrium; LV= Left ventricle.
Fig. 2: A) Histologic section of the blood cyst wall showing the presence of fibrous tissue
(Hematoxilin-eosin stain, original magnification x4). B) Immunostaining for the
endothelial antigen CD31 (brown colour ) highlighting the endothelial layer on the
luminal surface (Immunoperoxidase, hematoxylin counterstaining, original
magnification x 4).
Table 1: Characteristics of case reports and case series of blood cysts of the mitral valve apparatus.