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CONJOINED TWINS-THORACOPAGUS: CASE REPORT:

Conjoined twin pregnancy is rare form of identical twin pregnancy. They are referred as monozygotic, monoamniotic and monochorionic twins with varying degree and sites of fusion. In medicine they represent one of the rarest forms of twin gestation and are defined and classified by the conjoined body area according to the most prominent site of conjunction: thorax (thoracophagus), abdomen (omphalopagus), sacrum (pygophagus), pelvis (ischiophagus), skull( cephalopagus) and back (rachiopagus). The incidence is estimated at 1 in 50, 000 to 1 in 200, 000 births (4, 6). Approximately 75% of conjoined twins are females. Thoracopagus is most common form of conjoined twins with fusion from the anterior thorax to the umbilicus. They come as result of incomplete division of zygote later then the 12 th day after fertilization. A common pericardial sac is present in 90% of thoracopagus twins and the prevalence of conjoined hearts is 75%. Early prenatal diagnosis with ultrasound (US) and magnetic resonance imaging (MRI) of conjoined twins allows better counseling of the parents regarding the management options. A 40% of conjoined twins are stillborn and another 30% die during first day of life.

CONJOINED TWINS, THORACOPAGUS, DETECTION, ULTRASOUND, PREGNANCY

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