Yamashita Akiko, Ishii Keisuke, Hidaka Nobuhiro, Yonetani Naoto, Hayashi Shusaku, Takeuchi Makoto, Mitsuda Nobuaki
Department of Maternal Fetal Medicine, Osaka Medical Center and Research Institute for Maternal and Child Health, Izumi, Osaka, Japan.
Fetal Diagn Ther. 2015;37(2):154-6. doi: 10.1159/000367969. Epub 2015 Jan 27.
In this report, we present a case of twin-twin transfusion syndrome in the presence of the thick dividing wall of each sac in dichorionic twins. The dichorionic diagnosis was based on the presence of the lambda sign at the first-trimester ultrasound evaluation. In addition to fetoscopic and pathological investigation, DNA typing confirmed that the twin set was monochorionic and monozygotic. This case illustrates that although extremely uncommon, the presence of lambda sign does not exclude monochorionic pregnancy.
在本报告中，我们呈现了一例双绒毛膜双胎中每个羊膜囊存在厚分隔膜情况下的双胎输血综合征病例。双绒毛膜的诊断基于孕早期超声检查时出现的λ征。除了胎儿镜检查和病理研究外，DNA分型证实这对双胎为单绒毛膜单卵双胎。该病例表明，尽管极为罕见，但λ征的存在并不排除单绒毛膜妊娠。
