目的探讨卵黄囊声像图在早期先兆流产妊娠结局检测中的价值。

ObjectiveTo explore the value of characteristic of gravidas' yolk sac in the early pregnancy outcome of threatened abortion.

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目的：探讨监测血清afp对小儿肝母细胞瘤和卵黄囊瘤诊断和预后的意义。

Aim: to investigate the diagnosis and predication value of serum AFP in infants with hepatoblastoma and yolk-sac tumors.

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目的：探讨心脏卵黄囊瘤临床病理特征。

Purpose To study the clinicopathological features of yolk sac tumor (YST) of the heart.

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