A Case of Mammary Pseudoangiomatous Stromal Hyperplasia 15 Centimeters on the Long Axis with Cystic Component in a Postmenopausal Woman

Abstract

We report a case of mammary pseudoangiomatous stromal hyperplasia (PASH) with an axis longer than 15 cm and a cystic component in a postmenopausal woman. The 63-year-old woman complained of a left breast mass. The mass was about 15 cm diameter. Ultrasonography showed a mixed type mass with a cystic component. Core needle biopsy indicated PASH, so a tumor excision was performed. Post-operative histopathological diagnosis was the same as the preoperative diagnosis. In immunohistochemical staining, CD34 and vimentin were negative, CD31, factor VIII, ER and PgR were also negative. We report this case together with a review of the literature.