TRAP SEQUENCE: CASE REPORT

Abstract

TRAP sequence is a syndrome, seen in monochorionic twin pregnancies with poor prognosis and with a 1/100 incidence. It is characterized with a recipient fetus exhibiting lethal anomalies including acardia and a pump fetus supplying blood by vascular communications in the placenta. While pump twin is anatomically normal, in recipient twin who is supplied with hypoxic blood, the development is restricted with the lower part of the body. Mortality of acardiac twin is inevitable. Pump twin has the mortality rate of 50% and death is usually due to heart failure or premature labor caused by polihydramnios. Here, a TRAP sequence case with 21 weeks' of gestation diagnosed in antenatal period and terminated with the demand of the family is presented. Clinical presentation and therapeutic options were discussed in this case report.