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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
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): O.C. Guler
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).
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.
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.
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.