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- W2760650159 abstract "Previous pharmacologic studies demonstrated that higher sunitinib exposure is associated with improved clinical outcomes in patients with metastatic renal cell carcinoma (mRCC). We aimed to assess the efficacy and toxicity of sunitinib dose-escalation in mRCC patients progressing on the standard 50 mg dose. A single-institution retrospective review was conducted on mRCC patients, treated outside trials with a 50 mg sunitinib dose given on an individualized schedule between October 2009 and January 2016, who subsequently progressed on imaging. All progressing patients who were dose-escalated to 62.5 and 75 mg on an individualized schedule if toxicity permitted were eligible for this analysis. Median progression-free survival (PFS) and overall survival (OS) were analyzed using the Kaplan-Meier method. PFS1 and 2 were defined as the time between the start of sunitinib and first progression and the time between dose-escalation and second progression respectively. A total of 25 eligible patients were identified with a median follow-up of 40.3 months (Q1–Q3: 11.1–66.6) and a mean age of 54 years (standard deviation: 12.4). Most of the patients underwent cytoreductive surgery (92%) and were men (88%). In total 32%, 44%, and 24% had a good, intermediate, and poor prognostic Heng Score, respectively. At standard doses, 60% and 16% of patients had a partial response (PR) and a stable disease (SD) as best response respectively for a median duration of 11.4 months (95% CI: 3–20.7). A total of 6 patients (24%) had progressive disease as best response. After progression, 36% and 28% had PR and SD on higher doses of sunitinib respectively for a median duration of 7.8 months (95% CI: 6.3–12.4). The median PFS1, PFS2 and OS were 6.1 months (95% CI: 2.3–19.4), 6.7 months (95% CI: 3.1–8.4) and 63.7 months (95% CI: 26–NR) respectively. The most common adverse events after dose-escalation were fatigue (56%), diarrhea (40%) and skin toxicity (28%). Patients with mRCC who progress on 50 mg sunitinib dose, may derive a clinical benefit and prolonged survival from dose-escalation with acceptable toxicity profiles. These results need to be confirmed in prospective studies with the aim to overcome drug resistance and delay the change in systemic therapy at progression." @default.
- W2760650159 created "2017-10-06" @default.
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- W2760650159 date "2018-01-01" @default.
- W2760650159 modified "2023-10-02" @default.
- W2760650159 title "Sunitinib dose-escalation after disease progression in metastatic renal cell carcinoma" @default.
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- W2760650159 doi "https://doi.org/10.1016/j.urolonc.2017.09.004" @default.
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