Introduction: Chorioangiomas are benign, nontrophoblastic tumors of the
placenta. Giant chorioangiomas (larger 5 cm) are infrequent and have unfavorable
outcomes due to their strong association with maternal and fetal complications.
We describe a case of a giant chorioangioma that had a good outcome without
complications. Case report: A 27-year-old woman, primipara, with a
regularly monitored pregnancy was admitted to the hospital at 37 + 5 weeks of
gestation due to pain in the lower half of the abdomen, rupture of the amniotic
sac and accumulation of thick, green, amniotic fluid. Ultrasonography performed
at 33 weeks of gestation indicated the presence of a tumor mass 12.5 7.7 cm in
diameter that was localized near the chorionic surface. Cardiotocography
indicated variable decelerations, which necessitated an emergency cesarean
section. A live, healthy, male child was born without complications via Dorfler’s
cesarean section. The encapsulated tumor mass was manually removed from the
uterus, and angiomatous chorioangioma of the placenta was diagnosed by
pathohistological examination. Conclusion: Ultrasonographic monitoring
is the choice method for the accurate diagnosis and intervention of
chorioangioma, but only pathohistological examination can confirm the diagnosis.
This case report demonstrates that giant placental chorioangioma may have a
favorable outcome without any medical intervention.