Prenatal diagnosis of a huge foetal immature sacrococcygeal teratoma: our experience of a rare case and review of the literature

increased blood flow into the tumour. Pulsed Doppler showed the resistance index of flow velocity waveforms on the tumoural arteries to be 0.51. Amnioreduction of 740 cc amniotic fluid was performed under ultrasonographic examination. Caesar ean section was performed at 33 weeks’ gestation due to profuse polyhydramnios via an upper vertical incision in the uterus. After the stabilization of the newborn, tumour resection was successfully performed on the first day after delivery. Grossly, in the surgical specimen the tumour measured 18 cm in its maximum diameter and weighted 1 500 g. Conclusion Prenatal diagnosis and ultrasonographic follow-up are needed for the good prognosis of sacrococcygeal teratomas. Prenatal intervention should be considered when the foetus develops hydrops for foetal salvage or in cases with placentomegaly to avoid the maternal risk of mirror syndrome.