Tumoral pseudoangiomatous stromal hyperplasia (PASH) is a rare benign proliferative disease of the breast. The majority of the literature reports of PASH have not contained detailed descriptions of the imaging characteristics of PASH. A 10-year retrospective study of patients with tumoral
PASH and a 20-year Ovid MEDLINE® search were performed to determine whether specific imaging and needle biopsy results could characterize PASH preoperatively. We identified 22 patients with tumoral PASH. Seventeen (77%) of 22 women had a palpable lump and 14 (72%) of 21 had
a density on mammography. Ultrasound (US) findings included mixed or hypoechoic echogenicity in 83 per cent and ill-defined borders in 62 per cent. Eight (36%) patients had lesions with a Breast Imaging Reporting and Data System (BI-RADS®) classification of 4 or 5. The sensitivity
of preoperative core needle biopsy (CNB) to identify PASH was 83 per cent. A review of the literature revealed that 90 per cent of patients with PASH had some malignant imaging characteristics and 95 per cent had a mass on mammography. The imaging characteristics of PASH exhibited marked variability.
Excision of PASH after CNB may be considered for patients with symptoms, enlarging lesions, or lesions classified as BI-RADS® 4 or 5. PASH diagnosed by CNB allows selected patients to avoid excision.
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Document Type: Research Article
From the Department of General Surgery and the Norma J. Vinger Center for Breast Care (NJVCBV), the
Department of Radiology and the NJVCBC, the
Department of Pathology and the NJVCBC, and the
Department of Research, Gundersen Lutheran Medical Foundation, Gundersen Lutheran Health System, La Crosse, Wisconsin
Publication date: December 1, 2008
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