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Washington University Experience | VASCULAR | Intravascular Papillary Endothelial Hyperplasia (Masson Tumor) | 1A1 Intravascular Papillary Endothelial Hyperplasia (Case 1) 1 H&E WM
A whole mount of the lesion appears to represent a thrombus in a dilated vessel. The wall is intact with a fibrous surround and relatively little smooth muscle. There is significant variation in the appearance of the lesion from region to region (H&E)
