Chorioangioma is the most common benign tumor of the placenta, occurring in 1% of all pregnancies. Small chorioangiomas tend to remain asymptomatic. Giant chorioangiomas have been associated with a number of severe fetal complications and high perinatal mortality. We report a case of a giant chorioangioma diagnosed in the third trimester of pregnancy. The size of tumor and the amniotic fluid index increased fro...