In the majority syncytiotrophoblast of abnormal group, the blue granules diffused primarily around nucleus, the staining intension was weaker than normal.

• 异常组大多数合体滋养细胞中的蓝色颗粒呈弥散状于细胞核周围，无基底部聚集趋势，着色强度明显较正常组弱。