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P. Berzinec
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OA16 - Improving the Quality of Lung Cancer Care - Patients Perspective (ID 399)
- Event: WCLC 2016
- Type: Oral Session
- Track: Patient Support and Advocacy Groups
- Presentations: 1
- Moderators:G. Kreye, D. Tan
- Coordinates: 12/06/2016, 16:00 - 17:30, Schubert 6
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OA16.08 - Discussant for OA16.05, OA16.06, OA16.07 (ID 6978)
16:00 - 17:30 | Author(s): P. Berzinec
- Abstract
- Presentation
Abstract not provided
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P3.02a - Poster Session with Presenters Present (ID 470)
- Event: WCLC 2016
- Type: Poster Presenters Present
- Track: Advanced NSCLC
- Presentations: 1
- Moderators:
- Coordinates: 12/07/2016, 14:30 - 15:45, Hall B (Poster Area)
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P3.02a-026 - Crizotinib in Clinical Practice and in Clinical Trials - How Much the Results Differ? (ID 6377)
14:30 - 15:45 | Author(s): P. Berzinec
- Abstract
Background:
In Slovakia, since October 2012, crizotinib has been available for the treatment of adults with previously treated ALK-positive advanced NSCLC, based on the therapeutic indication approved by the European Medicines Agency. The purpose of this study was to assess the results achieved with crizotinib in the treatment of NSCLC in clinical practice in Slovakia, and to compare them with the results from the key clinical trial PROFILE 1007.
Methods:
In the multicentre retrospective study, approved by the Ethical Committee of the Specialised Hospital of St Zoerardus Zobor, the data of 34 ALK-positive patients from 8 centres were reviewed. Data regarding ALK testing and results were obtained from the central laboratory database (Comenius University Jessenius Medical Faculty and Martin's Biopsy Centre). Data regarding patients were obtained from the databases of participating institutions and patient files. Fluorescence in situ hybridisation (FISH) with break-apart probes was used for the confirmation of ALK rearrangement in all cases. Response to treatment was evaluated using RECIST criteria v. 1.1. Statistical analyses were performed using MedCalc[®] software. PFS and OS were estimated using the Kaplan–Meier method.
Results:
Between October 2012 and December 2015, 34 ALK-positive patients with locally advanced or metastatic NSCLC were treated with crizotinib, 31 of them after the first-line chemotherapy. Characteristics of patients: median age, years (range): 58 (23-77), ECOG/WHO PS: 0, 1, 2, 3 in 1, 23, 6, and 4 patients, respectively. Histology: adenocarcinoma in 33 cases, NSCLC, NOS in one. Patients with locally advanced disease: 2, with metastatic disease: 32. Median PFS was 18 months (95%CI: 13 - 22), median OS (number of events: 13, 38,24%): 32 months (95%CI: 18 - 32), response rates: CR + PR: 3 + 23, 76,5% (95%CI 50-100%), SD: 7, 21,5%, PD: 3, 8,8%, not stated: 1. There was a signifcant improvement in PS within 2 month, mean difference: - 0,62, p = 0,0025. Grade 3/4 toxicities occurred in 15/2 patients. Crizotinib was permanently discontinued due to AEs in 2 patients only. PFS and OS in our study were numerically better in comparison with PROFILE 1007. On the other hand, common grade 3 toxicities occured also more often.
Conclusion:
Conclusion: Our study provides real-world evidence of the efficacy of crizotinib in patients with ALK-positive NSCLC, treated outside of clinical trials. 
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P3.02b - Poster Session with Presenters Present (ID 494)
- Event: WCLC 2016
- Type: Poster Presenters Present
- Track: Advanced NSCLC
- Presentations: 1
- Moderators:
- Coordinates: 12/07/2016, 14:30 - 15:45, Hall B (Poster Area)
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P3.02b-029 - Primary Double EGFR Mutations T790M and Mutation in Exon 19 or 21 - Prevalence and Treatment Results in Slovakian NSCLC Patients (ID 6215)
14:30 - 15:45 | Author(s): P. Berzinec
- Abstract
Background:
Primary EGFR dual mutations comprising T790M and exon 19 or 21 mutation (SM, sensitizing mutations) are rare when common diagnostic methods are used. There are limited data about the treatment results with EGFR-TKIs in this setting. Purpose of this study was to find out the prevalence of primary dual EGFR mutations T790M and SM in the Caucasian population of NSCLC patients in Slovakia, and to evaluate treatment results with EGFR-TKIs in these patients.
Methods:
Retrospective multicentre study. The databases of the molecular/genetic diagnostic centres were searched for patients with dual EGFR mutations T790M and SM. Data regarding patients were obtained from the databases of participating institutions and patient files. Descriptive statistics was used for data analysis.
Results:
Altogether 3883 patients were tested for EGFR mutation from 2010 through 2015. Allele specific PCR was used in majority, high resolution melting analysis, Sanger sequencing and mutant-enriched PCR were also used. Double mutations T790M and SM were found in only six cases, i.e. the observed period prevalence was 0.15%. Patients’ characteristics and the treatment results are in the Table. PS was improved after two months of treatment in patients with initial PS over 1, and remained unchanged in those with PS 1. There were no unexpected AEs. Figure 1
Conclusion:
The prevalence of the dual EGFR mutations T790M and SM is very low in Caucasian population in Slovakia when common testing methods are used. Treatment results seen in this study suggest good effectiveness of the first or second generation EGFR-TKIs even in NSCLC with primary dual T790M and SM mutations. The quantitative analysis of these mutations using the blood sample is available at present. It might be useful in decision making about the use of the first – second or the third generation EGFR-TKI, based on the prevailing mutation.
