Anomaly associated with duodenal atresia is?
**Core Concept**
Duodenal atresia is a congenital anomaly characterized by a complete or partial obstruction of the duodenum, often associated with other genetic anomalies. The **embryological development** of the duodenum is crucial in understanding the pathogenesis of this condition.
**Why the Correct Answer is Right**
The correct answer is associated with duodenal atresia due to its frequent co-occurrence with **Down syndrome (Trisomy 21)** and other congenital anomalies. Approximately 20-30% of patients with duodenal atresia have Down syndrome.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect as it is not commonly associated with duodenal atresia.
**Option B:** Incorrect as this anomaly is not typically linked to duodenal atresia.
**Option C:** Incorrect as it does not have a direct correlation with duodenal atresia.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that duodenal atresia often presents with **bilious vomiting** in the neonatal period, and its diagnosis can be confirmed by the **"double-bubble" sign** on abdominal X-ray.
**Correct Answer:** D. Down syndrome