Here is another partial mole in a case of triploidy. Note the scattered grape-like masses with intervening normal-appearing placental tissue.

另例三倍体部分葡萄胎。显示有分散的葡萄状团块，内有正常外观的胎盘组织。

In partial moles, some villi (as seen here at the lower left) appear normal, whereas others are swollen. There is minimal trophoblastic proliferation.

在部分胎块中，一些绒毛（左下所示）表现正常，然而它处绒毛肿胀。有最小限度的滋养层增生。

The avascular villi of molar pregnancy are quite large. However, these must be distinguished from simple "hydropic degeneration" seen in placentas of fetuses undergoing intrauterine demise.

葡萄胎无血管绒毛是十分大的。须与单纯水样变性相区别。图示子宫内胎盘正在死亡。

Much less common than hydatidiform mole is choriocarcinoma, seen here. Villi are not present. Rather, there is a proliferation of bizarre trophoblastic cells. These tumors are very aggressive and are associated with very marked HCG levels. Half of choriocarcinomas arise in preceding hydatidiform moles.

绒毛膜癌比葡萄胎少见，如图所示。绒毛不存在，明显异型性的胚胎滋养层细胞增殖显著。具有很强的侵袭性，并与HCG关系密切。一半的绒毛膜癌发生于葡萄胎后。

Sometimes no normal decidual plate forms in pregnancy, and placental villi invade directly into myometrium, as seen here. This condition in known as placenta accreta. A hysterectomy may be necessary to control bleeding.

有时没有正常的蜕膜形成，胎盘绒毛直接侵入子宫肌层，如图示，称为胎盘粘连。子宫切除可有效控制出血。