Pathophysiology and treatment of fetal anemia due to placental chorioangioma

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Abstract
Placental chorioangiomas occur in 1% of pregnancies. Large chorioangiomas may cause serious complications such as fetal anemia, hydrops and fetal death. In this case report, a pregnancy complicated by a large placental chorioangioma is described. Severe fetal anemia without the occurrence of hydrops fetalis was suspected using ultrasound and Doppler examinations. Successful intrauterine blood transfusion was performed, with an unusually large amount of blood needed to obtain an adequate rise in fetal hematocrit. Two weeks later, at 32 weeks, the infant was born in good condition. In pregnancies with large chorioangiomas, we advise regular ultrasound and Doppler examinations, with the aim of detecting fetal anemia before hydrops develops. When anemia is suspected, fetal blood sampling is indicated and intrauterine transfusion therapy may be beneficial to preserve fetal health until maturity is reached. Copyright © 1999 International Society of Ultrasound in Obstetrics and Gynecology

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