![Frontal view of the abdomen with double bubble sign, patient was found to have duodenal atresia.

Kinder Radiologie Olga Hospital Klinikum Stuttgart - CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=32592969](https://s3-us-west-2.amazonaws.com/secure.notion-static.com/8b9569fb-8dff-4c81-a713-53867304301e/Untitled.png)

Frontal view of the abdomen with double bubble sign, patient was found to have duodenal atresia.

Kinder Radiologie Olga Hospital Klinikum Stuttgart - CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=32592969

![Double bubble sign. a Stomach and duodenum. b Stomach (arrow) with dilatation of proximal bowel (white triangle). Representative prenatal ultrasound images from cases in the study.

Bishop JC, McCormick B, Johnson CT, et al. The Double Bubble Sign: Duodenal Atresia and Associated Genetic Etiologies. Fetal Diagn Ther. 2020;47(2):98-103. doi:10.1159/000500471](https://prod-files-secure.s3.us-west-2.amazonaws.com/2aa05644-4658-4c26-84d3-64c36b55fb6c/4f87a547-9f12-40f0-957f-17278f494217/Double_Bubble_Sign.jpg)

Double bubble sign. a Stomach and duodenum. b Stomach (arrow) with dilatation of proximal bowel (white triangle). Representative prenatal ultrasound images from cases in the study.

Bishop JC, McCormick B, Johnson CT, et al. The Double Bubble Sign: Duodenal Atresia and Associated Genetic Etiologies. Fetal Diagn Ther. 2020;47(2):98-103. doi:10.1159/000500471

Etiology

Intrinsic causes:

Extrinsic causes: