EGFR and lung carcinoma: Given the contradictory epidemiological findings and the potential implication in lung carcinogenesis, we conducted a meta-analysis to pool the risk estimates from previous studies focusing on family history of cancer and somatic EGFR mutation; then by a second literature research, we summarized familial lung cancer cases with both potential CPGs and somatic EGFR mutation status reported to help to throw a light on this topic.