Lee G K, Chi J G, Cha K S
Department of Pathology, Seoul National University Children's Hospital, Korea.
Am J Clin Pathol. 1991 Jan;95(1):48-51. doi: 10.1093/ajcp/95.1.48.
The authors present an unusual vascular anomaly of the placenta. The placenta was very large, weighing 1,490 g. On the fetal surface, numerous dilated and tortuous vessels were observed on and under the chorionic membrane, of which three branches arose from a vein that was connected to the umbilical vein. One of them had a 5 x 2.5 cm aneurysmal dilatation, where three secondary branches arose. These venous channels were dilated and tortuous. The longest secondary branch was 133 cm in length and 1.2 cm in mean diameter and led into the placenta. Multiple, severely coiled or straight small branches arising from these vessels were also observed as vascular tangles. Some of these smaller vessels also led into the placenta. All abnormal vessels were veins. The umbilical cord was also normal except for a membranous insertion, and the placenta was unremarkable except for its large size.
作者报告了一例不寻常的胎盘血管异常。胎盘非常大，重1490克。在胎儿表面，在绒毛膜上和其下方观察到许多扩张和迂曲的血管，其中三个分支起源于一条与脐静脉相连的静脉。其中一个分支有一个5×2.5厘米的动脉瘤样扩张，从这里又发出三个二级分支。这些静脉通道扩张且迂曲。最长的二级分支长133厘米，平均直径1.2厘米，通向胎盘。从这些血管发出的多个严重盘绕或笔直的小分支也被观察到呈血管缠结状。其中一些较小的血管也通向胎盘。所有异常血管均为静脉。脐带除了膜状附着外也正常，胎盘除了体积大之外无异常。
