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Z. Bortlicek
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P3.01 - Poster Session/ Treatment of Advanced Diseases – NSCLC (ID 208)
- Event: WCLC 2015
- Type: Poster
- Track: Treatment of Advanced Diseases - NSCLC
- Presentations: 1
- Moderators:
- Coordinates: 9/09/2015, 09:30 - 17:00, Exhibit Hall (Hall B+C)
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P3.01-008 - Gefitinib in Front-Line Treatment of 161 Caucasian Patients with NSCLC of the Czech Republic (ID 424)
09:30 - 09:30 | Author(s): Z. Bortlicek
- Abstract
Background:
Gefitinib is a potent oral non-cytotoxic, active and selective epidermal growth factor receptor tyrosine kinase inhibitor. This study evaluates treatment outcomes in 161 NSCLC patients from Czech Republic according to activated mutations located in exons 19 and 21.
Methods:
Data treated patients with gefitinib are collected in the TULUNG registry, which is a common project of the Czech Pneumological Society, Czech Oncological Society, and Institute Biostatistics and Analyses Masaryk University Brno. NSCLC patients with EGFR activated mutations were treated in first line between 02/2010 and 12/2014 in 10 institutions. Retrospective analyses were carried out to assess the effectiveness and safety of gefitinib treatment according to activated mutations located in exons 19 and 21. The analysed outcomes include following: treatment response rate, median Overall Survival (mOS), median Progression Free Survival (mPFS) and occurrence of types adverse events.
Results:
Out of 161 treated patients, 105 (70 female, 35 male) had EGFR mutations in exon 19, and 56 (39 female, 17 male) had EGFR mutations in exon 21. Median age was 66 years in the group with mutations in exon 19 and 69 years in the group with mutations in exon 21. There was no statistically significant difference in sex (p=0.727) and in age (p=0.204). No statistically significant difference was observed in the representation in smoking (p=0.354). There was statistically borderline significant difference in adenocarcinoma proportion (p=0.045). In the group with mutations in exon 19 were 96% patients with adenocarcinoma and in the group with mutations in exon 21 were 85% patients with adenocarcinoma. Between these two groups, there was no statistically significant difference according to performance status (p=0.547); no statistically significant difference according to disease control (CR+PR+SD) (p=0.479); no statistically significant difference according the response to the treatment (CR + PR) (p=0.052). There was no statistically significant difference in mOS (p=0.390). In the group of patients with mutations located in exon 19, the overall survival was 22.7 months (CI 95%: 17.7; 27.8), in the group with mutations in exon 21, overall survival was 16.3 months (CI 95%: 10.8; 21.8). There was no statistically significant difference (p=0.202) in mPFS; in the group of patients with mutations in exon 19 it was 11,0 months (CI 95%:9.1; 12.8) and in the group with mutations in exon 21 it was 9.4 months (CI 95% 6.6; 12.2). SimiIar numbers of adverse effects were observed in either group (35.2% and 35.7%). Almost 70% of patients with mutations in exon 19 and almost 60% of patients with mutations in exon 21 are still alive or were lost to follow up. These patients are censored to the date of last update.
Conclusion:
In both groups of patients, the treatment was very safe. Median PFS and median OS were satisfactory without statistically significant differences between the two groups; however, a better trend was observed in the group of patients with mutations in exon 19. Consequently survival estimates shows great variability and longer potential follow up is needed to confirm these results.
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P3.08 - Poster Session/ Thymoma, Mesothelioma and Other Thoracic Malignancies (ID 226)
- Event: WCLC 2015
- Type: Poster
- Track: Thymoma, Mesothelioma and Other Thoracic Malignancies
- Presentations: 1
- Moderators:
- Coordinates: 9/09/2015, 09:30 - 17:00, Exhibit Hall (Hall B+C)
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P3.08-010 - Pemetrexed and Cisplatin in Malignant Pleural Mesothelioma - Czech Experience (ID 213)
09:30 - 09:30 | Author(s): Z. Bortlicek
- Abstract
Background:
Malignant Pleural Mesotelioma (MPM) is a tumour with extremely unfavourable prognosis. Early diagnostic is rarely possible and chemotherapy has limited value in prolongation of survival. Pemetrexed with platinum is the standard 1[st] line chemotherapy. In the Czech Republic, the incidence of MPM is influenced mostly by former industry processing asbestos for roofs, other parts of buildings and isolation materials. Any work with asbetos is prohibited in the mean time.
Methods:
Treatment with pemetrexed and cisplatin was evaluated in a prospective study. Data of consecutive patients from 9 centers were prospectively collected from January 2008 till February 2015. Altogether 181 patients (47 women, 134 men) were evaluated. Mean age was 62 years, 71 pts were non smokers, 47 smokers, 61 ex smokers. Professional/ non-professional exposure was reported in 44/ 18 pts. Histology: 119 epithelial, 20 mixed, 12 sarcomatoid, not specified in 30 pts, TNM st.: I/II/III/IV in 19/32/48/78 pts, not assessed in 4 pts, PS: 0/1/2 in 39/130/12 pts.
Results:
Median of treatment was 18.5 weeks. Most frequent side effects (Gr 3, 4): leucopenia in 22, neutropenia in 15, anaemia in 15, trombocytopenia in 6, nausea/vomiting in 19, fatigue in 8 pts. Therapeutic response: CR in 5, PR in 47, SD 85, PD in 21 pts, overall disease control was 75.6 %. The median of overall survival (OS) was 19.8 months (16.2; 23.4), 1 year survival 67.9% (48.3; 71.5). Median of progression free survival (PFS) was 9.1 months (7.6; 10.7). Differences of survival were compared according to sex, smoking history, age, PS, TNM stage, treatment associated AE occurrence, type of exposure and histology. Significantly different results were achieved according to PS,TNM, exposure, AE and histology.
Conclusion:
Treatment of MPM with pemetrexed and cisplatinum in routine practice is effective and well tolerated. Prognosis is still poor and it is influenced by several clinical markers. Longer survival can be expected in PS 0, TNM I/II, unknown asbestos exposure, epitheloid histology and no treatment associated AE. Supported by national grant IGA MZ ČR NT/13569
