材料和方法：对肾移植患者检测出乙肝病毒表面抗原(HBsAg)阳性者进行肝活检，由此确定病毒复制证据。

Patients and METHODS: Renal transplant patients positive for HBV surface antigen (HBsAg) and submitted to a liver biopsy because of evidence of viral replication were included.

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外科医生用活检针在病变椎体表面皮肤进行穿刺。

The surgeon punctures the skin over the affected vertebra with a biopsy needle.

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