Anomalous origin of the right pulmonary artery from the descending aorta in a fetus.

Anomalous origin of the branches of the pulmonary artery to the aorta (AOPA) is a rare anomaly that accounts for .12% of all congenital heart defects. AOPA is usually characterized by the anomalous origin of one of the pulmonary arteries from the ascending aorta. We describe a 41-year-old pregnant woman in 24 + 0 weeks of gestation was diagnosed fetal AOPA by ultrasound. Further pathological examination revealed that the fetal right pulmonary artery originated from descending aorta. To the best of our knowledge, our study presented a very rare fetal case of fetal right pulmonary artery originating from descending aorta diagnosed by prenatal ultrasound diagnosis and confirmed by postnatal autopsy.