Giant Placental Chorioangioma: An Unusual Cause of Adverse Foetal and Neonatal Outcome Chorioangioma is the most common benign tumour of the placenta, accounting for 1% of the pregnant cases. Giant chorioangiomas are known to be correlated with a higher rate of adverse fetal and neonatal complications, including fetal cardiac failure, fetal anemia, hydrops, intrauterine death and neonatal demise. Early detection and serial ultrasound monitoring are essential for timely intervention to ensure a favourable pregnancy outcome. We report a case of giant chorioangioma complicated with polyhydramnios with poor fetal and neonatal outcome.