Experimental, tissue study. Patients with EGFR receptor amplification/overexpression or activating mutations treated with anti-EGFR cancer therapies will be involved in the study as required in normal clinical practice. Clinical information of the patients, relevant to the conduct of the study, will be collected: age, sex, ethnicity, smoking habit, diagnosis, staging of the tumor, site of any metastases, possible presence of ascites and/or pleural effusion, type of oncological therapy administered, concomitant therapies, radiological re-evaluation of the tumor, response to treatment, survival.
Similarly, peripheral blood, tissue obtained from archival tumor biopsies, ascitic and/or pleural fluid samples (taken, if present, as per clinical practice) will be collected. Primary cell cultures will be derived from tumor biopsies, ascites, and/or pleural effusion for in vitro studies The lymphocyte population will be isolated from the peripheral blood of patients
