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Limited prognostic value of tissue protein expression levels of BCl-2 in Danish ovarian cancer patients: from the Danish ‘MALOVA’ ovarian cancer study

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Høgdall EVS, Christensen L, Kjaer SK, Blaakaer J, Christensen IJ, Høgdall CK. Limited prognostic value of tissue protein expression levels of BCl-2 in Danish ovarian cancer patients. APMIS 2010; 118: 557–64.

The purpose of the study was to determine the expression of BCl-2 in epithelial ovarian tumors and to correlate expression levels with selected clinicopathologic parameters, time to progression and prognosis of the disease. Using tissue arrays (TA), we analyzed BCl-2 expression in tissues from 191 women diagnosed with low malignant potential ovarian tumors (LMP) and from 582 patients diagnosed with ovarian cancer (OC). Using 30% as cutoff level for BCl-2 overexpression, 5% of LMPs were positive with a higher proportion of serous ovarian tumor of LMP, compared to mucinous ovarian tumor of LMP (p = 0.02). Women with a BCl-2-positive LMP tumor were older than women with a BCl-2 negative tumor (p = 0.02). Ten percent of OCs were positive for BCl-2 expression (≥30%). No significant association was found between BCl-2 expression levels and histologic type of tumors (serous vs mucinous, p = 0.19). A 30% cutoff value or a percentage scale showed that BCl-2 expression had no prognostic value, both in univariate and in multivariate survival analyses. No difference in time to progression was observed between patients with BCl-2-positive and negative tumors. These data suggest that BCl-2 expression may not be of important clinical value in the treatment of Danish OC patients.
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Keywords: BCl-2; Tissue array; immunohistochemistry; ovarian cancer; prognosis

Document Type: Research Article

Affiliations: 1: Department of Pathology, Bispebjerg Hospital, University of Copenhagen, Copenhagen 2: Department of Gynecology & Obstetrics, Aarhus University Hospital, Skejby, Aarhus 3: Finsen Laboratory, Rigshospitalet, Copenhagen Biocenter, University of Copenhagen, Copenhagen, Denmark 4: The Gynaecologic Clinic, The Juliane Marie Centre, Rigshospitalet, University of Copenhagen, Copenhagen

Publication date: 2010-08-01

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