原发性肝癌(下称肝癌)是我国高发的恶性肿瘤之一,其发病率在东南沿海各省市全部肿瘤中占第三或第四位。我国东北地区此病亦不少见。肝癌好发于男性中年人,由于肝癌的确切病因未明,目前还缺乏有效的预防方法,其发病率似有增高的趋势。肝癌的诊断困难在于多数早期病例缺乏特征性临 Primary liver cancer (hereinafter referred to as hepatocellular carcinoma) is one of the most prevalent malignancies in China, and its incidence rate ranks third or fourth among all tumors in the southeast coastal provinces and cities. The disease in Northeast China is also uncommon. Liver cancer occurs in middle-aged men. Because the exact cause of liver cancer is unknown, there is currently a lack of effective methods for prevention. The incidence of liver cancer seems to increase. The difficulty in diagnosing liver cancer lies in the lack of characteristic features in most early cases.