Abstract | BACKGROUND: METHODS: MITO 37 is a multicenter retrospective study aiming at correlating Ki67 expression at diagnosis with a clinical outcome following platinum treatment and PARPi maintenance. Clinical data were collected from high grade serous or endometroid BRCAWT OC treated with niraparib or rucaparib maintenance between 2010-2021 in 15 centers. Ki67 expression was assessed locally by certified pathologists on formalin-fixed paraffin embedded (FFPE) tissues. Median Ki67 was used as a cut-off. RESULTS: A total of 136 patients were eligible and included in the analysis. Median Ki67 was 45.7% (range 1.0-99.9). The best response to platinum according to median Ki67 was 26.5% vs. 39.7% complete response (CR), 69.1% vs. 58.8% partial response (PR), 4.4% vs. 1.5% stable disease (SD). The best response to PARPi according to median Ki67 was 19.1% vs. 36.8% CR, 26.5% vs. 26.5% PR, 26.5 vs. 25% SD, 27.9% vs. 16.2% progressive disease (PD). No statistically significant differences in progression free survival (PFS) and overall survival (OS) were identified between low and high Ki67. PFS and OS are in line with registration trials. CONCLUSIONS: Ki67 at diagnosis did not discriminate responders to PARPi.
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Authors | Valentina Tuninetti, Eleonora Ghisoni, Sandro Pignata, Elisa Picardo, Francesco Raspagliesi, Claudia Andreetta, Elena Maldi, Grazia Artioli, Serafina Mammoliti, Lucia Zanchi, Angelica Sikokis, Nicoletta Biglia, Alessandro Parisi, Vincenzo Dario Mandato, Claudia Carella, Gennaro Cormio, Marco Marinaccio, Andrea Puppo, Biagio Paolini, Lucia Borsotti, Giulia Scotto, Margherita Turinetto, Dario Sangiolo, Massimo Di Maio, Giorgio Valabrega |
Journal | Cancers
(Cancers (Basel))
Vol. 15
Issue 4
(Feb 06 2023)
ISSN: 2072-6694 [Print] Switzerland |
PMID | 36831376
(Publication Type: Journal Article)
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