Hampton hump seen in the chest X-ray is a feature of:
**Core Concept**
Hampton hump is a radiographic sign characterized by a well-defined, rounded or oval opacification at the lung periphery, typically seen in the upper lobes. This sign is associated with pulmonary edema, particularly in the context of heart failure.
**Why the Correct Answer is Right**
Hampton hump is caused by the accumulation of fluid in the lung interstitium, leading to the appearance of a rounded or oval shadow on the chest X-ray. This fluid accumulation is often due to increased hydrostatic pressure in the pulmonary veins, as seen in left ventricular failure. The fluid then migrates to the lung periphery, where it is trapped by the lymphatic system, resulting in the characteristic Hampton hump sign.
**Why Each Wrong Option is Incorrect**
**Option A:** Not a recognized radiographic sign.
**Option B:** Not associated with pulmonary edema or heart failure.
**Option C:** Refers to a different radiographic sign, not a characteristic of pulmonary edema.
**Clinical Pearl / High-Yield Fact**
In patients with suspected heart failure, a Hampton hump on the chest X-ray can be a critical diagnostic clue, suggesting the presence of pulmonary edema. This sign can be a key differentiator between heart failure and other causes of respiratory symptoms.
**Correct Answer:** D. Pulmonary edema