Answer to the case of the week #191

Joan Acosta Diez, MD.

Unitat de Medicina Materno fetal (Diagnòstic Prenatal) Hospital de l"Esperit Sant. Santa Coloma de Gramanet, Spain.

A 23-year-old woman G2P1 first time presented at 19th week of pregnancy. Her first baby had a pulmonary stenosis. Ultrasound investigation revealed a hypoplastic thorax and decreased fetal movements. A single umbilical artery was also seen. We repeated the scan at 20th week and the fetus had normal movements but in the three vessel view, we saw an "U" image with trachea and esophagus in the middle. The initial diagnosis was of a right aortic arch. Amniocentesis was performed, 46, XX normal. The diagnosis was confirmed at birth and the baby is doing well.