Intracranial outcomes will be assessed by modified RECIST criteria (mRECIST) and analyzed. The added value of the increased dose (160 mg) after failure of the standard dose will be assessed as well. Since only neurologically asymptomatic patients are planned to be enrolled, it is important to use mRECIST criteria which allows small brain lesions to be assessed (according to these criteria, ≥ 5mm tumors are considered measurable and up to 5 target lesions are allowed) 1. Systemic response assessment will be done using RECIST 1.1. Exploratory analysis of the outcomes will be performed according to the treatment setting ( treatment-naïve vs. acquired resistance setting) and EGFR mutation subtype. Additionally, serum protein biomarker analysis will be performed in correlation with intracranial and systemic response. Safety parameters will be monitored.