Giant Placental Chorangioma: A Rare Case Report

Watchful Expectant Management of a Giant Placental Chorioangioma With Favorable Maternal and Fetal Outcomes: A Case Report

Placental chorioangioma is the most common benign tumor of the placenta. However, clinically evident chorioangiomas are less common with an incidence ranging between 1:3,500 and 1:9,000 births. In the majority of cases, it is small or microscopic and of no clinical significance. If it increases more than 5 cm in size, then it may be associated with serious maternal complications such as mirror syndrome, polyhydramnios, preeclampsia, antepartum hemorrhage, preterm labor and delivery, and postpartum hemorrhage, as well as fetal complications such as fetal anemia, fetal thrombocytopenia, fetal hydrops, intrauterine growth restriction, fetal demise, and neonatal death. Giant chorioangioma associated with polyhydramnios leads to high perinatal morbidity and mortality. Chorioangioma with complications before fetal viability needs interventions. Conservative management with close surveillance can be considered in selective cases. We report a case of giant placental chorioangioma complicated with severe polyhydramnios managed conservatively with favorable maternal and fetal outcomes.

CD133 Expression in Placenta Chorioangioma Presenting as a Giant Asymptomatic Mass

Background: Placental chorioangioma is the most common benign non-trophoblastic neoplasm of the placenta. Its clinical relevance lies in the size of the tumor since larger masses cause pregnancy complications, including an unfavorable neonatal outcome. Case presentation: We report the case of a 34-year-old second gravida and nullipara at the 35th week of gestation, admitted to the gynecological department for antibiotic-resistant fever. The cardiotocography performed during hospitalization showed an abnormal fetal pattern. A 2250 g newborn was delivered by cesarean section. No complications were observed during childbirth and postpartum was insignificant. On gross inspection a white fleshy intraparenchymal mass blooming on the maternal surface was noted; routinely stained sections revealed features consistent with chorioangioma with vascular channels lined by inconspicuous endothelial cells immunoreactive for CD31 and CD133. Focal expression of CD133 was also observed in placental villi. Discussion: CD133 expression indicated the presence of stem cells in chorioangioma, suggesting their possible role in the development of mesenchymal lesions including chorioangioma.