Intravascular papillary endothelial hyperplasia along the intrinsic muscle after hand contusion injury: Report of two cases

Intravascular papillary endothelial hyperplasia (IPEH), also known as Masson's tumor or vegetant intravascular hemangioendothelioma, is a reactive condition representing an exuberant organization and recanalization of a thrombus. It can occur in normal blood vessels or in vascular malformations, perhaps in response to blood vessel injury or thrombosis