Which sign is associated with duodenal atresia?

The double bubble sign is a classic radiological finding associated with duodenal atresia. This sign is identified on an abdominal X-ray and represents the appearance of two prominent air-filled structures: the distended stomach and the proximal duodenum. The absence of air beyond the second bubble indicates that there is an obstruction, typical of duodenal atresia.

This condition is typically diagnosed in newborns who present shortly after birth with signs of bilious vomiting and abdominal distension. The double bubble sign is significant in that it not only suggests the presence of a duodenal obstruction but also serves as a prompt for clinicians to further investigate and manage the underlying condition, as timely intervention is critical to avoid complications like dehydration and electrolyte imbalances.

In contrast, other signs mentioned in the options, such as the triple bubble sign, string of pearls sign, and tea cup sign, represent different conditions or anatomical variations and are not specific to duodenal atresia. The understanding of these signs allows for prompt recognition and appropriate treatment of gastrointestinal congenital anomalies.