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  • Title: Prognostic significance of Ki67 evaluated by flow cytometry in dogs with high-grade B-cell lymphoma.
    Author: Poggi A, Miniscalco B, Morello E, Gattino F, Delaude A, Ferrero Poschetto L, Aresu L, Gelain ME, Martini V, Comazzi S, Riondato F.
    Journal: Vet Comp Oncol; 2017 Jun; 15(2):431-440. PubMed ID: 26792094.
    Abstract:
    Ki67 can discriminate between high- and low-grade canine lymphomas, but its prognostic role in specific subtypes of the neoplasm is unknown. We assessed the prognostic significance of Ki67% (percentage of Ki67-positive cells), evaluated by flow cytometry, in 40 dogs with high-grade B-cell lymphoma, treated with a modified Wisconsin-Madison protocol (UW-25). The following variables were investigated for association with lymphoma specific survival (LSS) and relapse free interval (RFI): Ki67%, breed, sex, age, stage, substage, complete remission (CR). By multivariate analysis, Ki67% (P = 0.009) and achievement of CR (P = 0.001) were independent prognostic factors for LSS. Dogs with intermediate Ki67% (20.1-40%) presented longer LSS and RFI (median = 866 and 428 days, respectively) than dogs with low (median = 42 days, P < 0.001; median = 159 days, P = 0.014) or high (median = 173 days, P = 0.038; median = 100 days, P = 0.126) values. Determination of Ki67 is a prognostic tool that improves the clinical usefulness of flow cytometric analysis in canine high-grade B-cell lymphoma.
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