Micrograph of an excised aortic valve<unk>  showing that the avascular branching papillae are covered by endothelium. H&E stain.<unk>  are typically found and accurately diagnosed by imaging. The diagnosis is confirmed by pathology. Histologically,<unk> s have branching avascular papillae, composed of collagen, that are covered by endothelium.
Papillary fibroelastoma
Fibrin ring granuloma
Actinic elastosis
Acrokeratoelastoidosis of Costa
Lipofibromatosis
Pyogenic granuloma
Eosinophilic granuloma
Silicone granuloma