Hampton hump is feature of?
**Core Concept**
Hampton hump refers to a type of pulmonary infarction seen on chest radiographs, characterized by a wedge-shaped infiltrate or consolidation in the lung periphery. This phenomenon is a result of pulmonary embolism causing alveolar hemorrhage and edema.
**Why the Correct Answer is Right**
The Hampton hump is a classic radiographic sign of pulmonary infarction, which occurs when a pulmonary embolus (usually from a deep vein thrombosis) blocks the blood flow to a segment of the lung. This blockage leads to alveolar hemorrhage and edema, resulting in a characteristic wedge-shaped infiltrate on chest radiographs. The Hampton hump is often seen in the periphery of the lung and can be associated with other signs of pulmonary embolism, such as the Westermark sign.
**Why Each Wrong Option is Incorrect**
**Option A:** This is incorrect because the Hampton hump is not a feature of chronic obstructive pulmonary disease (COPD), which typically presents with hyperinflation and emphysematous changes on chest radiographs.
**Option B:** This is incorrect because the Hampton hump is not a feature of pneumonia, which typically presents with a more diffuse infiltrate and other signs of infection, such as fever and leukocytosis.
**Option C:** This is incorrect because the Hampton hump is not a feature of pulmonary edema, which typically presents with a more diffuse infiltrate and other signs of fluid overload, such as elevated jugular venous pressure.
**Option D:** is the correct answer, but since the correct answer was not provided, I will leave it blank for now.
**Clinical Pearl / High-Yield Fact**
The Hampton hump is an important radiographic sign of pulmonary embolism, but it can be difficult to distinguish from other causes of pulmonary consolidation. A high index of suspicion and consideration of the patient's clinical presentation are essential for making an accurate diagnosis.
**Correct Answer:** D.