s S123 of an abnormal finding in the placental sonogram. Our ultrasound examination revealed a huge placental chorioangioma of an anterior placenta in an intact double-ovum twin pregnancy with normal developed fetuses. Imaging Findings or Procedure Details: Blood perfusion in the chorioangioma was checked and Doppler controls were performed (umbilical andmiddle cerebral artery). Pulsatility index (PI) and resistive index (RI) values were in normal limits. At 36 + 6 weeks gestation, a Misgav Ladach cesarean section was carried out. Two female infants were born weighing 2710 g, Apgar 8/9/10, pH 7.24, BE -5.2 and 2300g, Apgar 9/9/ 10, pH 7.23, BE -5.2, respectively. Histologically two placentas were described, 443 and 762 g, each with a three-vessel umbilical cord and small infarcts. The found hamartomous placental tumor, size 10,7 x 9.3 x 1.9, presented with innumerable blood vessels, lobulas, expanded villi, cystic spaces, dilated vascular channels and calcified areas in the proliferating trophoblastic epithelium. Conclusion: Such large clinically significant chorioangiomas occur very rarely (0.2-4:10,000 births). Often, they cause severe fetal complications, but not in this extraordinary case of a chorioangioma of the vascular type.