Which one of the following is not an aetiology of transudative pleural effusion?
**Core Concept**
Transudative pleural effusion is a type of pleural effusion characterized by a low protein content in the pleural fluid, typically resulting from an imbalance in hydrostatic and oncotic forces. It is often associated with conditions that increase fluid accumulation in the pleural space, such as heart failure and cirrhosis.
**Why the Correct Answer is Right**
In contrast to exudative pleural effusions, which are caused by inflammatory, infectious, or malignant processes, transudative pleural effusions are usually due to non-inflammatory causes. The correct answer is an aetiology of transudative pleural effusion, making it a characteristic feature of this condition.
**Why Each Wrong Option is Incorrect**
**Option A:** This is a common cause of exudative pleural effusion, typically resulting from the accumulation of fluid rich in protein and cells.
**Option B:** While cirrhosis can cause transudative pleural effusion due to portal hypertension, it is not the correct answer as it is a known cause of this type of effusion.
**Option C:** This is a classic example of an exudative pleural effusion, often resulting from the inflammatory response to infection or malignancy.
**Clinical Pearl / High-Yield Fact**
It is essential to differentiate between transudative and exudative pleural effusions, as the underlying causes and management strategies differ significantly between the two types.
**Correct Answer: D. This is a classic example of an exudative pleural effusion, often resulting from the inflammatory response to infection or malignancy.**