A patient was referred at 21 weeks' gestation for evaluation of an echogenic mass in the fetal right chest. Color-doppler sonography facilitated the diagnosis of a bronchopulmonary sequestration. Clinicopathologic correlation was possible after termination at 2.3 weeks' gestation. Pathologic examination confirmed the prenatal diagnosis and demonstrated the systemic vascular supply seen on color-doppler sonography. Color doppler is a useful adjunct in the sonographic evaluation of the fetus with an echogenic chest mass.