Table of Contents

Washington University Experience | VASCULAR | Intravascular Papillary Endothelial Hyperplasia (Masson Tumor) | 4B1 Meningioma, RadioRx , Intravascular PEH (Case 4) H&E 1

4B1-13 Additional material also submitted (separately) as tumor has a different histologic appearance. 4B1,2 Hyaline nodules are scattered throughout the specimen and likely reflect the effect of gamma knife therapy in 2006 and 2013. Notice the clefts within which are lined by spindled non-tumor cells (H&E)

---