氡引起的多数肺癌病例发生在吸烟者中。
Most of the radon-induced lung cancer cases occur among smokers.
大约30%的人类肺癌病人有Kras突变。
About 30 percent of human lung cancer patients have mutations in Kras.
目的：提出一位以虹膜肿瘤为初步表现的肺癌病例报告。
Purpose: To report a case of primary pulmonary cancer with initial presentation of iris tumor.
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