Prenatal sonographic diagnosis of Cantrell's pentalogy with cystic hygroma in the first trimester.

We report 2 cases of Cantrell's pentalogy with cystic hygroma diagnosed in the first trimester of pregnancy. Both fetuses had ectopia cordis, omphalocele, a sternal defect, and cystic hygroma detected by sonography. Cystic hygroma may be another characteristic of Cantrell's pentalogy in the first trimester.