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C. Erasun
Author of
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P1.01 - Advanced NSCLC (ID 757)
- Event: WCLC 2017
- Type: Poster Session with Presenters Present
- Track: Advanced NSCLC
- Presentations: 1
- Moderators:
- Coordinates: 10/16/2017, 09:30 - 16:00, Exhibit Hall (Hall B + C)
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P1.01-062 - KRAS Mutations (KRAS-Mut) and antiPD1/PDL1 Therapy in a Cohort of Lung Cancer (LC) Patients (P). Experience from a Single Institution (ID 9548)
09:30 - 09:30 | Author(s): C. Erasun
- Abstract
Background:
AntiPD1/antiPDL1-based immunotherapy has changed dramatically the prognosis of LC p with a substantial improvement of overall survival (OS) and even presenting long lasting responses in a subset of p. Several factors have been associated with the likelihood of better survival, which include the smoking exposure and the presence of KRAS-mut according to data from randomized clinical trials that compared chemotherapy to these immunotherapeutic agents.
Method:
By reviewing the clinical records of all stage IV LC p treated with antiPD1/antiPDL1 agents, we identified p with KRAS-mut and evaluated their clinical outocomes.
Result:
129 p with advanced NSCLC were treated with nivolumab, pembrolizumab or atezolizumab (65.1%, 17.1% and 17.8 %, respectively) from November 2013 to April 2017. 14 p were identified as adenocarcinomas with KRAS-mut (20.3%) of all non-squamous NSCLC (60p), once squamous cell carcinoma (39 p), p with Kras status unknown (15p), other reasons (6p) were excluded. KRAS-mut subgroup include 28.5% of female, median (m) age of 62.3 years, 92.8% of ever smokers, and PS0-1. The immunotherapy consisted of nivolumab (71.4%) and pembrolizumab and atezolizumab (14.3% each) and was administered as 1[st], 2[nd] and >3[rd] therapy in 7.1,78.6 and 14.3% of p, respectively. 71.4% of p responded to therapy (64.3% partial response) and in 42.8% of p this response lasted >12 months (range 12-32). For this cohort of p m progression-free survival was 7.65 months and OS was 58 months. At the time of analysis 57.1% were still receiving treatment.
Conclusion:
Although the number of p is small, KRAS-mut p represent a subgroup of p that seem to substantially benefit from antiPD1/PDL1 agents in terms of both response and survival.
