Bilateral congenital diaphragmatic hernia: diagnostic clues at fetal sonography.

Bilateral congenital diaphragmatic hernia is a rare, life-threatening malformation. We describe a case of bilateral Bochdalek hernia diagnosed prenatally. The sonographic clues to the diagnosis were anterior displacement of the heart with relatively minimal lateral shift. The definitive diagnosis was made by demonstrating the liver in the right thorax and bowel loop and stomach in the left thorax. Color and power Doppler demonstrated the hepatic vessels embracing both sides of the heart from behind.