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E. Topkan



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    MINI 04 - Clinical Care of Lung Cancer (ID 102)

    • Event: WCLC 2015
    • Type: Mini Oral
    • Track: Treatment of Advanced Diseases - NSCLC
    • Presentations: 1
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      MINI04.13 - Survival Analysis of 51 Leptomeningeal Metastatic Non Small Cell Lung Cancer Patients Treated with Whole Brain Radiotherapy (ID 2625)

      16:45 - 18:15  |  Author(s): E. Topkan

      • Abstract

      Background:
      Although leptomeningeal carcinomatosis (LC)in Non small cell lung cancer is less frequently seen in radiotherapy (RT) clinics, it is an important cause of mortality and morbidity. As the median survival is limited to 2-4 months, the role of RT in treatment is controversial. In this Study, we try to analyze the survival rates and associated factors of 51 leptomeningeal brain metastatic NSCLC patients treated with whole brain radiotherapy (WBRT).

      Methods:
      Between January 2007 to August 2014, during follow up with the diagnosis of NSCLC, 51 patientswho develop LC and treated with WBRT in our clinic had included this study. Patients were treated with 20-30 Gy (3-4 Gy/fr) WBRT. Kaplan-Meier method was used for survival analysis. Bonnefoni correction was performed for survival analysis of groups more than two before statistical analysis.

      Results:
      Median age of patients were 64 (37-83) and 34(67.7%) of them are male. Patient number with ECOG performance status of 0-1, 2 and 3 were23 (%45.1), 15 (%29.4) and 13 (%25.5) respectively.%58.8 of patients had squamous cell cancer and %41.2 of them were adenocancer. The dose of WBRT in 31 patients was 20 Gy (4 Gy/fr; BED~10~=28 Gy) and 30 Gy (3Gy/fr; BED~10~=39 Gy) in the other 20 patients. At the time of performing these analyses all the patients had died.Median survival was 3.9 ay (%95 CI: 3.3- 4.5). On univaryan analyses, age (≤50 vs. >50; p=0.46), gender (p=0.37),histological subtype (squamous cell vs. adenocancer; p= 0.74) and BED~10~value (39 vs. 28 Gy; p=0.26) did not show any statistically difference but ECOG performance status (0-1 vs. 2-3; p<0.001) was associated with overall survival. Median survival duration times for ECOG 0-1 and 2-3 groups were 5.7 and 3.7 respectively.

      Conclusion:
      Median survival of 3.9 months of our study is similar with literature but it is also querying the necessity of RT in this group of patients especially with poor performance status. However, the survival benefit of 5.8 months in ECOG performance 0-1 group may lead us to think that WBRT is useful. Although there has been no survival benefit between two RT dose schemes, 20 Gy (4 Gy/fr) may be the treatment of choice because of the shorter duration.

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    MINI 17 - WT EGFR, Angiogenesis and OMD (ID 131)

    • Event: WCLC 2015
    • Type: Mini Oral
    • Track: Treatment of Advanced Diseases - NSCLC
    • Presentations: 1
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      MINI17.13 - Prognosis of Stage III NSCLC Patients Presenting with Isolated Brain Failure after Definitive Concurrent Chemoradiotherapy (ID 1338)

      16:45 - 18:15  |  Author(s): E. Topkan

      • Abstract

      Background:
      We retrospectively investigated the survival outcomes of stage III non-small-cell lung cancer (NSCLC) patients presenting with isolated brain failures (IBF) after definitive concurrent chemoradiotherapy (C-CRT) and treated with whole brain radiotherapy (WBRT) ± stereotactic radiosurgery (SRS) or surgery.

      Methods:
      A total of 162 patients with stage III NSCLC who were treated with platinum based C-CRT between January 2007 and December 2012 and presented with proven IBF with/without locoregional failures were included in this retrospective analysis. All patients received WBRT of 20-30 Gy (3-4 Gy/fx) ± SRS of 16-22 Gy or surgery. The primary and secondary end points were overall survival (OS) and identification of factors associated with longer survival.

      Results:
      Median follow-up was 12.7 months from the IBF diagnosis.IBF occurred at median 7.8 months (range: 1.7-46.4) from the commencement of C-CRT.WBRT was the sole local intervention in 78 patients whereas 55 and 29 patients received additional SRS or surgery mostly prior to WBRT. Median and 3-year survival rates were 11.7 months and 20.4%, respectively. In univariate analysis, controlled primary (20.3 vs. 6.4 months; p<0.001) and absence of extracranial metastasis development during follow-up (23.3 vs. 10.6 months; p<0.001) were determined to be significantly associated with longer OS times, which also retained their independent significance in multivariate analysis. Addition of SRS or surgery was related with better brain control rates but not OS in overall population. However, in patients presenting with ≤3 brain lesions and controlled lung primary the addition of SRS or surgery to WBRT was associated with significantly superior OS times than WBRT alone (25.8 vs. 8.2 months; p<0.001).

      Conclusion:
      Present results demonstrated that controlled lung primary and absence of extracranial metastasis development during follow-up period were the factors positively associated with longer OS after WBRT ± SRS or surgery in stage III NSCLC patients presenting with IBF after platinum based C-CRT.Additionally, our results suggested superior survival with addition of SRS or surgery to WBRT in patients with 1-3 brain lesions and controlled lung primaries.