[Chorangioma of the placenta]

The authors describe a rare case of large tumour of the placenta (chorangioma) in a 25-year-old woman. The chorangioma was prenatally diagnosed by sonography in the 22nd gestational week. The course of pregnancy was not complicated. After sonographic observation of the course of the disease the woman was delivered of a child without malformations in the 39th gestational week.