Presentation
G1P0. The uterine fundal height is more than expected for the gestational age.
Patient Data
Two dilated communicating digestive structures in the left upper and mid-abdomen giving the appearance of a double bubble sign and representing a dilated fetal stomach and proximal duodenum. No other associated fetal anomalies.
Evidence of polyhydramnios, the largest fluid pocket depth (maximal vertical pocket (MVP)) was greater than 16 cm.
Case Discussion
Ultrasound features most consistent with duodenal atresia.
If a double-bubble sign is seen on antenatal ultrasound (as in this case), it is important to demonstrate a connection between the two fluid-filled structures because foregut duplication cyst, as well as other abdominal cysts, may simulate the appearance of a double-bubble sign
For an ultrasound appearance of a "double bubble" type appearance also consider: