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结肠直肠癌、乳腺癌、肺癌是西方国家最常见的恶性肿瘤。由于治疗结果和存活与确诊时肿瘤有否扩散密切相关,所以提高治疗效果和延长存活期的重要途径之一在于早期诊断。然而,由于这些疾病在普通人群中的发病率并不很高,因此普查除对那些曾明确为发生肿瘤高风险的一定人群外,几乎并无多少优越性。为进行大规模的普查,所用的方法也必须是经济易行。试管白细胞吸附抑制(LAI)试验是能进行大量筛选早期肿瘤的高敏感和有特异性的方法之一。这项试验的理论基础在于与致敏的抗原一起温育的肿瘤病人白细胞,会失去对玻璃壁的附着能力。
Colorectal cancer, breast cancer, and lung cancer are the most common malignancies in Western countries. Since the treatment outcome and survival are closely related to the proliferation of the tumor at diagnosis, one of the important ways to improve the therapeutic effect and prolong the survival period is early diagnosis. However, because the incidence of these diseases in the general population is not very high, the screening has few advantages other than the certain populations that have been identified as having a high risk of developing tumors. For a large-scale census, the methods used must also be economically feasible. The leukocyte adsorption inhibition (LAI) test in vitro is one of the highly sensitive and specific methods for screening large numbers of early tumors. The theoretical basis of this test is that leukocytes from tumor patients incubated with sensitized antigens lose their ability to adhere to the glass wall.