Siwatch Sujata, Sodhi Rohan, Khastgir Gaurav, Sikka Pooja
Obstetrics and Gynaecology, Postgraduate Institute of Medical Education and Research, Chandigarh, IND.
Cureus. 2025 Jul 8;17(7):e87555. doi: 10.7759/cureus.87555. eCollection 2025 Jul.
Twin reversed arterial perfusion (TRAP) sequence is a rare complication of monochorionic twin pregnancies, characterised by a nonviable acardiac twin perfused by a structurally normal "pump" twin. We report a case of a 33-year-old woman, G4P2012, who presented at 29 weeks in advanced labour with a history of inadequate antenatal care. She delivered a live male neonate, followed by the unexpected delivery of an intrauterine mass initially suspected to be a fibroid. Further evaluation revealed the mass to be an acardiac twin, and placental examination confirmed monochorionic diamniotic placentation, establishing the diagnosis of TRAP sequence. This case highlights the critical importance of early and detailed antenatal ultrasonography in twin pregnancies. It also raises important questions regarding the classification of stillbirths in the context of severe congenital anomalies incompatible with life.
双胎反向动脉灌注序列征（TRAP）是单绒毛膜双胎妊娠的一种罕见并发症，其特征为一个无生机的无心双胎由结构正常的“泵血”双胎供血。我们报告一例33岁女性，孕4产2012，在孕29周时因产前检查不足前来就诊，处于晚期分娩状态。她产下一名存活男婴，随后意外娩出一个最初怀疑为肌瘤的子宫内肿物。进一步评估显示该肿物为无心双胎，胎盘检查证实为单绒毛膜双羊膜囊胎盘，从而确诊为TRAP序列征。该病例凸显了双胎妊娠早期详细产前超声检查的至关重要性。它还引发了关于严重先天性异常导致的死胎在与生命不相容情况下分类的重要问题。
