TRANSVAGINAL ULTRASOUND DIAGNOSIS OF TWIN REVERSED ARTERIAL PERFUSIONSYNDROME AT 9 WEEKS GESTATION

Diagnosis of twin reversed arterial perfusion syndrome was made using transvaginal sonography at 9 weeks' gestation. The morphological evalu ation of the abnormal twin revealed a dysmorphic cephalic pole and abs ence of the upper extremities. There was diffuse subcutaneous edema an d no detectable cardiac activity. The other twin had a normal appearan ce and a size compatible with the gestational age. The fetuses were di vided by a thin amniotic membrane with normal amniotic fluid in both s acs. Diagnosis was confirmed by demonstrating fetal growth and lower l imb activity in the abnormal twin 10 days later.