title: Intravascular Papillary Endothelial Hyperplasia (Masson's Tumor) of the Radial Artery: A Case Report.
abstract: Intravascular papillary endothelial hyperplasia (IPEH), often referred to as Masson's tumor, is a benign non-neoplastic vascular lesion of the skin and subcutaneous tissues. Although it is rare, knowledge of the existence of IPEH is important as it can mimic other benign and malignant tumors, most notably angiosarcoma. IPEH remains an incompletely understood entity; however, most consider it to be the result of reactive endothelial proliferation following thrombus formation within a vessel, vascular malformation, or adjacent to a vessel. In this article, we report a case of IPEH arising within an arteriovenous malformation of the radial artery and present accompanying multimodality imaging and pathology figures. We will also describe the clinical presentation, pathophysiology, histology, imaging features, and management of IPEH.
authors.affiliation: Department of Radiology, University of Vermont Medical Center, 111 Colchester Avenue, Burlington, VT, 05401, USA. Christopher.stark@uvmhealth.org.
authors.forename: Christopher
authors.identifier: http://orcid.org/0000-0002-3007-5527
authors.initials: C
authors.lastname: Stark
authors.affiliation: Department of Pathology, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA.
authors.forename: Daniel
authors.initials: D
authors.lastname: Olsen
authors.affiliation: Department of Radiology, University of Vermont Medical Center, 111 Colchester Avenue, Burlington, VT, 05401, USA.
authors.forename: Christopher
authors.initials: C
authors.lastname: Morris
authors.affiliation: Department of Surgery, University of Vermont Medical Center, 111 Colchester Avenue, Burlington, VT, 05401, USA.
authors.forename: Daniel
authors.initials: D
authors.lastname: Bertges
authors.affiliation: Department of Radiology, University of Vermont Medical Center, 111 Colchester Avenue, Burlington, VT, 05401, USA.
authors.forename: Kenneth
authors.initials: K
authors.lastname: Najarian
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D006801:Humans; D006965:Hyperplasia; D008279:Magnetic Resonance Imaging; D008297:Male; D017534:Radial Artery / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D018608:Ultrasonography, Doppler; D054079:Vascular Malformations / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D019043:Vascular Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery
keywords: Intravascular papillary endothelial hyperplasia; Masson’s tumor; Radial artery