Fig. 3From: Papillary fibroelastoma of the aortic valve presenting with chronic angina and acute stroke: a case reportHematoxylin and eosin stain of the papillary fibroelastoma with narrow elongated and branching papillary fronds formed by central avascular collagen and elastic tissue core and the flat endocardial lining (left panel view, 2× magnification; right panel, 10× magnification)Back to article page