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(一)防治髓外白血病的必要性近廿年来,“急白”的治疗有很大进展。随着缓解率的提高,生存期的延长,加之诊断水平的提高,髓外白血病的发病率明显增加,如中枢神经系统白血病(以下简称脑白)发病率,1954年以前为10％,至1964年以后增至50～70％。1972年以来,由于广泛开展“随白”的预防性治疗,“脑白”复发率有所下降,睾丸成了引起复发的另一“避难所”。47％的男性白血病首次复发出现在睾丸,从而
(A) the need for prevention and treatment of extramedullary leukemia Over the past 20 years, “rapid white” treatment has made great progress. With the improvement of remission rate, the prolongation of survival and the increase of diagnosis, the incidence of extramedullary leukemia increased significantly, such as the incidence of central nervous system leukemia (hereinafter referred to as “white”), from 10% before 1954 to 1964 After 50 to 70% increase. Since 1972, the prevalence of “brain white” relapse has declined as a result of extensive “Preventive Treatment” with “whitening” and the testis has become another “refuge” for relapse. 47% of the first relapse of male leukemia occurs in the testes, thus