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The study aimed to compare two prognostic models in terms of progression-free survival (PFS), median overall survival (OS), and 1-year survival in patients treated first-line with sunitinib for metastatic renal cell carcinoma (mRCC). Data from patients who met prognostic model criteria for recording of baseline parameters and outcomes in the Czech Patient Registry RENal Information System (RENIS) were included in the retrospective analysis (n = 495). Performance of the modified Memorial Sloan Kettering Cancer Center (MSKCC) model and International Database Consortium (IDC) model was compared. PFS and OS were estimated using the Kaplan-Meier method. The statistical significance of differences in Kaplan-Meier estimates was assessed using the log-rank test. Median OS for prognostic groups according to MSKCC and IDC criteria, respectively, was 39.5 months (95 % confidence interval [CI]: 23.9–55.2) versus 44.3 months (95 % CI: 31.6–56.9) for favourable-risk patients (no adverse factors), 28.5 months (95 % CI: 20.1–36.8) versus 24.8 months (95 % CI: 19.8–29.8) for intermediate-risk patients (1–2 adverse factors), and 10.6 months (95 % CI: 6.3–14.8) versus 9.3 months (95 % CI: 5.1–13.5) for poor-risk patients (≥3 adverse factors). The majority of MSKCC poor-risk patients (54.1 %, n = 72) were reclassified as intermediate-risk using IDC criteria, and 20.2 % (n = 61) of MSKCC intermediate-risk patients were reclassified to the IDC favourable-risk group. Both prognostic models were validated in the present cohort. Use of the IDC model resulted in an upward shift in prognostic assessment compared to the MSKCC model.

In this study we performed the CHEK2 c.1100delC mutation analysis in 1046 breast cancer patients and 730 unaffected control individuals. The mutated allele was found in 3 out of 688 unselected sporadic breast cancer patients and in 1 out of 358 familial/early onset breast cancer patients. Two mutations were identified in a cohort of 730 controls. Our results support the finding that frequency of CHEK2 c.1100delC mutation varies among different populations. Based on our results, genotyping of CHEK2 c.1100delC mutation in clinical settings in the Czech Republic could not be recommended.