[Giant chorioangioma and its perinatal complications. A report of a case].

It is presented a clinical case of a pregnant patient, who attended to the hospital's emergency service because of the presence of transvaginal liquid. A polyhidramnios was diagnosed, due to a placental chorioangioma (of approximately 7 cm), which was confirmed by hystopatological examination, reporting placental chorioangioma with its three histological types: cellular, angioblastic and degenerative. The case and its complications, such as polyhidramnios, membranes rupture and preterm labor, are analized. Existing literature is reviewed.