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对74例肺癌和76例良性肺癌患者进行了血清及支气管肺泡洗液(BALF)中超氧化歧化酶(SOD)和溶菌酶(LZM)的测定,结果表明:(1)肺癌患者血清及BALF中SOD水平明显降低,以癌患侧BALF中SOD降低最明显,阳性率为71.8%。腺癌较鳞癌及小细胞癌低,周围性肺癌较中央型低,Ⅲ、Ⅳ、期较Ⅰ、Ⅱ期低。(2)肺癌患者血清及BALF中LZM水平降低,阳性46.3%和59.7%。小细胞癌降低最明显,