Prenatal ultrasound image of ileal atresia with meconium pseudocyst

(A) Sagittal ultrasound at 28 weeks of gestation shows several dilated loops of bowel.
(B) Axial image of the fetal abdomen shows a large cystic mass containing echogenic fluid anterior to dilated bowel loops consistent with a meconium pseudocyst.
(C) Newborn abdominal radiograph shows a mass containing air in the right midabdomen and dilated bowel loops to the left. Dilated small bowel loops surround the mass.
(D) Contrast enema shows a microcolon surrounding the air-filled meconium pseudocyst. At surgery, an ileal atresia with perforation into a meconium pseudocyst was identified.