Alderson的回顾性研究材料证实,哮喘患者因各种癌(除肺癌外)而死亡者比一般人群明显减少。他提出这可能与哮喘患者少与致癌物质接触或哮喘可以通过变态或免疫机理而对抗恶性病有关。本文作者则认为哮喘组癌发生率较低,可能是涉及环一磷酸腺甙(C—AMP)的药理作用。这些哮喘患者在一个长时间内几乎必都服过支气管扩张剂。许多 Alderson’s retrospective study confirmed that patients with asthma due to various cancers (except lung cancer) were significantly fewer than the general population. He argues that this may be linked to less cancer-causing substance in patients with asthma or that asthma may be associated with malignant disease through metamorphosis or immune mechanisms. The authors suggest that the lower incidence of cancer in the asthma group may be related to the pharmacological effects of cyclic AMP (C-AMP). These asthmatics have almost always taken bronchodilators over a long period of time. a lot of