Fig. 4From: Papillary fibroelastoma originating from the atrial septum touching the mitral valve leading to infective endocarditis: a case reportHistopathological findings. (A) Hematoxylin-eosin staining of the tumor showing the proliferation of papillae covered with a thin layer of endothelial cells (scale bar = 500 μm). (B) Elastica Van Gieson staining showing proliferation of elastic fiber in papillae stained in black (scale bar = 500 μm)Back to article page