Her blood routine test, liver function test, electrolyte and renal function test, and lung cancer markers including Carcinoembryonic antigen (CEA), neuron-specific enolase (NSE), squamous cell carcinoma (SCC), CYFRA21-1 were all within the normal range, as were thyroid function test, coagulation function test, and pulmonary function test. This evidence concerns the gene CEACAM5 and squamous cell carcinoma.