TRAP sequence; case report

TRAP sequence is a syndrome with poor prognosis seen in monochorionic twin pregnancies at the rate of 1/100. There is an acardiac “nonviable” fetus with multiple anomalies in the TRAP sequence and a pump fetus feeding this fetus through vascular anastomoses in the placenta. Mortality for acardiac twins is 100%. The mortality of the pump twin is around 50%, and death may be generally due to high flow rate heart failure and sometimes prematurity caused by polyhydramnios. Here, we presented an acardiac acephalous type TRAP case that applied to the Obstetrics and Gynecology Clinic of Amasya University Sabuncuoğlu Şerefeddin Training and Research Hospital. The case was 30 years old. The patient had the first pregnancy and reached this pregnancy with the IVF method. She did not have any disease. During the measurement of NT, the fetus of acardiac acephalous type was detected. Laser ablation was performed at the outer center at 18 weeks. All subsequent follow-ups were done by our center. While the patient had 39 weeks and 2 days of pregnancy, the pregnancy was terminated by performing cesarean due to primipara breech arrival.