Presentation
Pregnancy review at 17 weeks gestation.
Patient Data
Age: 25 years
Gender: Female
From the case:
Twin reversed arterial perfusion (TRAP) sequence
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"Pump" twin - normal biometry and morphology. There is a small pericardial effusion but no evidence of cardiomegaly or hydrops.
Acardiac twin - distorted and underdeveloped anatomy, severe hydrops with cystic hygromas. A single umbilical artery with flow towards the fetus.
Single posterior placenta. There is a large artery to artery anastomosis on the superficial aspect of the placenta between the pump and acardiac cord insertions (see the second stack).
The cervix is closed.
Case Discussion
Typical findings in a twin reversed arterial perfusion (TRAP) sequence.