Start Your Search
MINI 13 - Genetic Alterations and Testing (ID 120)
- Event: WCLC 2015
- Type: Mini Oral
- Track: Biology, Pathology, and Molecular Testing
- Presentations: 1
MINI13.13 - Non-Small Cell Lung Cancer (NSCLC) Harboring EGFR Mutations (EGFR-m) and Breast Cancer (BC): A Retrospective Analysis (ID 2857)
10:45 - 12:15 | Author(s): B. Cirauqui
EGFR-m in NSCLC and its responsiveness to TKI has proved beneficial in a subset of NSCLC patients (p) Breast cancer (BC) represents the most incident neoplasm among women. The co-existence of both EGFR-m-NSCLC and BC has been reported in p with Li-Fraumeni Syndrome. However, no systematic evaluation of the presence of both types of cancers has been performed in the general population.
We sought to evaluate if EGFR-m-NSCLC associates higher rates of 2[nd] BC than the EGFR-wild type (WT)p. Clinical and molecular characteristics, as well as clinical outcomes of female p visited at our Institution from 2008 to 2014 and harboring both types of tumors were registered.
69/578 female p with EGFR-m were identified. Data on treatment and follow-up of 62p were available. 11/ 62p (17.7%) were diagnosed with both EGFR-m-NSCLC and BC. For EGFR-m-W-p, BC was diagnosed in 3 cases (0.52%) Regarding EGFR-m-NSCLC, age of diagnosis was 65y; 100% of p were Caucasian and never smokers. Del19, L858 and L861Q represented the 72.7%, 27.3% and 9% of EGFR-m. 36.3% had stage IV, 27.2% recurred after surgery and 36.3% initial stages never recurred. 63.6% received a TKI (42.8% erlotinib). 85.7% received TKI as 1[st] line. The overall response rate was 85.7%. 42.8% received subsequent therapies. The cause of death was related to lung cancer in all cases of death (54.5%). mOS was 29 months from the time of LC diagnosis. Regarding BC, the median age of diagnosis was 52y, BC was a prior diagnosis in 90.9%; the stage was 0, I, IIA and IIIA in 18.18%, 27.27%, 45.45% and 9.09%, respectively. After surgery (100%), 36.36% received ET, 36.36% both chemotherapy and ET and 54.54% radiotherapy (RT). 83.33% of p treated with RT developed the LC in the RT field. 90.90% of p never recurred.
Diagnosis of BC appears to be higher in EGFR-m-NSCLC-p than in the general population. Evaluation of the molecular mechanism potentially related to this association is warranted.
Only Active Members that have purchased this event or have registered via an access code will be able to view this content. To view this presentation, please login or select "Add to Cart" and proceed to checkout.