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Washington University Experience | VASCULAR | Intravascular Papillary Endothelial Hyperplasia (Masson Tumor) | 1D2 Intravascular Papillary Endothelial Hyperplasia (Case 1) CD31 7
1D2-4 Successively higher magnification images of the papillary portion of the process stained for CD31 (CD 31 IHC) Note the similarity to CD34.