Volume 114, Issue 5 pp. 548-556
Research Article

Ductal carcinoma in situ on stereotactic biopsy of suspicious breast microcalcifications: Expression of SPARC (Secreted Protein, Acidic and Rich in Cysteine) can predict postoperative invasion

Bartlomiej Szynglarewicz MD

Corresponding Author

Bartlomiej Szynglarewicz MD

Breast Unit, Department of Surgical Oncology, Lower Silesia Oncology Center, Wroclaw, Poland

Correspondence to: Dr. Bartlomiej Szynglarewicz, MD, Breast Unit, Department of Surgical Oncology, Lower Silesia Oncology Centre—Regional Comprehensive Cancer Center, L.Hirszelda 12, 53-431 Wroclaw, Poland. Fax: +48713689219. E-mail: [email protected]

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Piotr Kasprzak MD

Piotr Kasprzak MD

Department of Breast Imaging, Lower Silesia Oncology Center, Wroclaw, Poland

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Piotr Donizy MD

Piotr Donizy MD

Department of Pathomorphology and Oncological Cytology, Wroclaw Medical University, Wroclaw, Poland

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Przemyslaw Biecek MSc

Przemyslaw Biecek MSc

Faculty of Mathematics, Informatics and Mechanics, University of Warsaw, Warsaw, Poland

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Agnieszka Halon MD

Agnieszka Halon MD

Department of Pathomorphology and Oncological Cytology, Wroclaw Medical University, Wroclaw, Poland

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Rafal Matkowski MD

Rafal Matkowski MD

Breast Unit, Department of Surgical Oncology, Lower Silesia Oncology Center, Wroclaw, Poland

Department of Oncology, Wroclaw Medical University, Wroclaw, Poland

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First published: 20 July 2016
Citations: 8
Conflict of interest: None to declare.

Abstract

Background and Objectives

Secreted protein, acidic and rich in cysteine (SPARC) is able to play an important role in cancer invasion due to de-adhesive properties and impact on stromal remodeling. The aim of study was to investigate SPARC expression in preoperatively diagnosed breast DCIS and to assess its predictive value for the final invasion.

Methods

A total of 209 patients with DCIS found on stereotactic vacuum-assisted biopsy of suspicious microcalcifications were studied prospectively.

Results

SPARC staining was positive in luminal epithelial cells, stromal fibroblasts, and myoepithelial cells in 38%, 62%, and 61% of tumors, respectively. Neither patient age nor pattern of microcalcifications were related to SPARC expression. High nuclear grade and comedonecrosis were associated with strong immunoreactivity of SPARC in stromal fibroblasts and myoepithelial cells while not in luminal epithelial cells. Rate of postoperative invasion was significantly increased in DCIS with strong SPARC staining with regard to all investigated cells. None of standard parameters significantly influenced the upgrading risk. In multivariate analysis most significant and independent predictive factors were strong SPARC expression in luminal epithelial cells, and stromal fibroblasts.

Conclusions

SPARC can be a new biomarker helpful to identify more aggressive DCIS and for prediction of invasive disease on final pathology. J. Surg. Oncol. 2016;114:548–556. © 2016 Wiley Periodicals, Inc.

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