Papillary endothelial hyperplasia (PEH) is an uncommon benign vascular proliferation appearing in soft tissues in different body areas including the breast, which may be related to radiation therapy. A 48-year-old woman previously treated for breast cancer with mastectomy followed by radiation therapy and reconstruction with an implant presented with a newly developing mass in the implant capsule. Pathological diagnosis was PEH. Imaging features of this rare entity are described, and lesions included in differential diagnosis are discussed.
Keywords: Masson's tumor; breast cancer; implant; intravascular papillary endothelial hyperplasia; irradiation; vascular proliferation.
© 2019 Wiley Periodicals, Inc.