Placental abruption after amnioreduction for polyhydramnios caused by chorioangioma.

Placental chorioangioma is the most common type of a benign placental tumour that occurs in 1% of pregnancies. A large chorioangioma is associated with adverse pregnancy outcomes. We present a case of placental abruption necessitating preterm delivery after multiple amnioreductions for polyhydramnios caused by a large chorioangioma. If antenatal diagnosis of a significant chorioangioma is made as the cause of polyhydramnios, caution should be taken when performing rapid amnioreductions. © BMJ Publishing Group Ltd (unless otherwise stated in the text of the article) 2018. All rights reserved. No commercial use is permitted unless otherwise expressly granted.