本文对69例原发部位不明的颈部转移癌,采用免疫酶法进行血清 VCA-IgA 抗体检测,并分析寻找原发肿瘤的结果。血清 VCA-IgA 抗体滴度1:10以上阳性时,应着重考虑鼻咽癌的可能;抗体阴性或低滴度阳性(<1:20)时,则多从鼻咽腔外的部位寻找.抗体滴度愈高,提示鼻咽癌机会愈大.这种检测方法有利于缩短发现原发肿瘤的时间,争取及早治疗以提高疗效。 In this article, 69 patients with metastatic carcinoma of the neck with unknown primary site were tested for serum VCA-IgA antibody by immunoenzymatic method and analyzed for the primary tumor. When the serum VCA-IgA antibody titer is more than 1:10, the possibility of nasopharyngeal carcinoma should be considered; when the antibody is negative or low titer is positive (<1:20), the antibody is more likely to be found outside the nasopharyngeal cavity. The higher the titer, the greater the chance of nasopharyngeal cancer. This detection method is conducive to shorten the time to find the primary tumor, fight for early treatment to improve the efficacy.