In the 217 AsCs observed, 21 cases (9.68%) with the HBsAg negatively converted, the average year negative conversion rate being 0.58%, among them, 13/21 cases (61.9%) had production of anti HBs antigen; 20 cases were clinically cured;

• 2 17例AsC 16年间HBsAg转阴 2 1例 (9 6 8%25 ) ,平均年转阴率为 0 5 8%25 ,其中6 1 9%25 (13/ 2 1例 )产生抗 HBs,2 0例属临床治愈 ,1例转化为HCC。