Immunohistochemical evaluation of 104 lung cancer tissues and 25 normal tissues revealed that the positive expression rates of apoA1 and SAP were 14.23% (15/104) and 9.62% (10/104), respectively, in cancer, and 84% (21/25) and 80% (20/25), respectively, in normal tissue (P<0.05) (Table 2 and 3). The gene discussed is APCS; the disease is cancer.