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Washington University Experience | VASCULAR | Intravascular Papillary Endothelial Hyperplasia (Masson Tumor) | 2D1 Intravascular Papillary Endothelial Hyperplasia (Case 2) CD31 3
2D1,2 A similar pattern is seen using the endothelial marker CD31 which, in this case, also labels clusters of endothelial cells between vascular channels. (CD31 IHC)
