Prenatal diagnosis of bilateral cystic adenomatoid malformation of the lung.

Bilateral cystic adenomatoid malformation of the lung (CAML), solid type (Stocker III), is a rare malformation that we observed sonographically in two fetuses at 23 weeks. The ultrasonic image showed an echogenic mass compressing the heart and occupying the whole thoracic cavity. Massive ascites, probably as a result of heart failure, was apparent. The prognosis is fatal. Prenatal diagnosis enables termination of pregnancy and saves the mother from invasive procedures in case of fetal distress. In unilateral, more favorable lesions, the managing physician is prepared for respiratory distress of the newborn and an emergency operation.