Hiperplasia endotelial papilífera de supra-renal: relato de caso

Peripheral nodular enhancement in adrenal and renal hematomas: A report of 3 cases

“…PEH, also known as Masson's tumor, is a reactive process seen in stages of organization and recanalization of a hematoma/hemangioma or any vascular malformation [7] . PEH is benign and is most frequently seen in the skin and integument of the head, neck, and extremities, but may involve any of the visceral organs [8] , [9] , [10] , [11] , [12] , [13] . In the third case, pathology did not show any areas of PEH, but instead very dense peripheral areas of organization comprised of thickened fibromuscular cellular proliferation without atypia or increased mitoses, along with hemosiderin-laden macrophages, and multiple areas of calcification.…”

Concomitant Retroperitoneal Intramuscular Hemangioma and Intravascular Papillary Endothelial Hyperplasia: An Unusual Case Report

“…IPEH may grow outside the vascular lumen after rupture of the vessel and spill over into the surrounding structures, which resembles invasive angiosarcoma. However, the malignant features in angiosarcoma such as high mitotic index, pleomorphism, or extensive necrosis should be absent in IPEH [7] [9]. Thus, surgical treatment with a histological diagnosis is necessary to avoid unnecessary chemotherapy or radiotherapy [7].…”