Fig. 2
Macroscopy and microscopy of the involved tricuspid valve and vegetation. a Yellow arrowhead: The large vegetation, Blue arrowhead: rupture mainchordae tendinae. b Blue arrowheads: Multiple verrucous nodular vegetation on the atrial surface of leaflet. c Resected tricuspid valve. Blue arrowheads: multiple small vegeatations, Yellow arrowhead: rupture main chordae tendinae. d microscopy of the vegetation adhered to the leaflet, Magnification 4×, Hematoxylin and Eosin stain. e enlarged square area in (e) showing inflammatory cell infiltration and fibrin-platelet thrombi, Magnification 20×, Hematoxylin and Eosin stain