In utero diagnosis of congenital pyloric atresia in a single twin using MRI and ultrasound.

Congenital pyloric atresia (CPA) is a rare disorder that has traditionally been diagnosed in the postnatal period. With improvements in ultrasound technology and increasing use of MRI, CPA is now diagnosed with increasing accuracy in utero. This also allows for identification of concomitant anomalies, which greatly affects infant survival. In addition, antenatal diagnosis of CPA and associated anomalies allow for family counseling and planning of treatment for the perinatal period including early referral to a center with pediatric surgical services. Here, we present a case of CPA with preoperative diagnosis using ultrasound and MRI.