图示左侧为心脏瓣膜，右侧颜色较浅的为疣状赘生物。此赘生物呈现红色，是由纤维素和血小板构成的。此赘生物在形态学上显示像一个棕色的纸袋。此种淡粉色的赘生物是在非细菌性血栓性心内膜炎的时候形成的特征性改变。
The valve is seen on the left, and a bland vegetation is seen on the right. It appears pink because it is composed of fibrin and platelets. It displays about as much morphologic variation as a brown paper bag. Such bland vegetations are typical of the non-infective forms of endocarditis.