Intravascular papillary endothelial hyperplasia – low magnification

Also known as Masson’s tumor or pseudoangiosarcoma

Typically occurs within a vein or a pre-existing vascular structure

Characterized by multiple papillary projections within the lumen of the vessel

Often associated with thrombosis

Intravascular papillary endothelial hyperplasia – high magnification

LEGEND

  • The vessels are composed of a single layer of endothelial cells without atypia.