Prenatal diagnosis of fetal abdominal masses by real-time ultrasound.

Two cases of fetal abdominal masses were discovered in utero by real-time ultrasound. They were diagnosed as follicle ovarian cysts and multicystic kidney in the early days of life. Ultrasound should be used on all pregnant women in the second trimester, not only for assessment of fetal growth and placental position, but also for prenatal diagnosis of fetal malformation and fetal abdominal masses, as it is invaluable to postnatal management decision.