Erlotinib is a drug which targets non small cell lung cancer with a genetic change (mutation) in the epidermal growth factor receptor (EGFR). This drug has been used in other cancer research studies and information from those studies suggests that Erlotinib can control the growth of these cancer cells.
Name: Erlotinib
Description: Participants were classified into 4 potential resistant mechanism groups (4 genetic/ 1 histologic) based on evaluation of rebiopsy tissue: EGFR mutations (T790M mutation, exon 20 insertion), KRAS mutations, MET amplification or small-cell lung cancer (SCLC) transform using established methods.
Measure: Resistance Mechanism Time: Participants were evaluated for incidence of genetic mechanisms of secondary resistance at time of disease progression at which point participants stopped treatment. Progression follow up was up to 3 years in this study cohort.Description: Progression-free survival based on the Kaplan-Meier method is defined as the duration of time from study entry to documented disease progression (PD) or death. Per RECIST 1.1 criteria: progressive disease (PD) is at least a 20% increase in the sum of longest diameter (LD) of target lesions taking as reference the smallest sum LD recorded since the treatment started or the appearance of one or more new lesions. PD for the evaluation of non-target lesions is the appearance of one or more new lesions and/or unequivocal progression of non-target lesions.
Measure: Progression-Free Survival Time: Disease was evaluated radiologically every 8 weeks on treatment (cycle duration=4 weeks). Participants were treated until evidence of disease progression or unacceptable toxicity. Progression follow-up was up to 3 years in this study cohort.Allocation: N/A
Single Group Assignment
There is one SNP
Participants were classified into 4 potential resistant mechanism groups (4 genetic/ 1 histologic) based on evaluation of rebiopsy tissue: EGFR mutations (T790M mutation, exon 20 insertion), KRAS mutations, MET amplification or small-cell lung cancer (SCLC) transform using established methods.. Progression-Free Survival. --- T790M ---
Non-small Cell Lung Cancer Lung Neoplasms Carcinoma, Non-Small-Cell Lung PRIMARY OBJECTIVE -To prospectively assess the frequency of different genetic mechanisms of secondary resistance in patients' tumors during treatment with erlotinib (e.g., T790M mutations, MET amplification). --- T790M ---