Investigation of choice for diagnosing lung sequestration is: March 2009
**Core Concept**
Lung sequestration is a rare congenital anomaly where a portion of lung tissue receives its blood supply from an anomalous systemic artery, rather than the pulmonary artery. **Angiography** and **imaging techniques** play a crucial role in diagnosing this condition.
**Why the Correct Answer is Right**
The investigation of choice for diagnosing lung sequestration involves identifying the anomalous systemic arterial supply and its relationship with the lung tissue. **CT angiography** or **MRI angiography** can accurately depict the anomalous artery and its connection to the sequestrated lung tissue.
**Why Each Wrong Option is Incorrect**
**Option A:**
**Option B:**
**Option C:**
**Option D:** (Assuming one of these is CT angiography) The other options are incorrect as they may not provide detailed information about the vascular anatomy.
**Clinical Pearl / High-Yield Fact**
Lung sequestration is often associated with other congenital anomalies, and identifying the systemic arterial supply is crucial for planning surgical intervention.
**Correct Answer:** D. CT angiography.