常見例句雙語例句Yolk sac tumor rarely involves the pericardium.卵黃囊瘤很少涉及心包。syyxw.comPurpose To study the clinicopathological features of yolk sac tumor(YST) of the heart.目的：探討心臟卵黃囊瘤臨床病理特征。Objective:Malignant germ cell tumors occur in childhood at a rate of 2 to 3 cases per million children, and Yolk sac tumor accounts for the most(62.7%) of malignant germ cell tumors.目的：兒童惡性生殖細(xì)胞腫瘤的發(fā)病率是百萬分之二到三，卵黃囊瘤是其中最常見的兒童惡性生殖細(xì)胞腫瘤，約占62.7％。 返回 yolk sac tumor