Which condition involves accumulation of fluid in the extravascular spaces, often secondary to other conditions?

Which condition involves accumulation of fluid in the extravascular spaces, often secondary to other conditions?

• A. Pleurisy
• B. TB
• C. Pneumonia
• D. Pulmonary edema

Answer: (D)

Fluid accumulation outside blood vessels is edema. When this occurs in the lungs, it becomes pulmonary edema, with fluid collecting in the lung interstitium and, if it advances, the alveolar spaces. This pattern usually follows conditions that raise pressures in the pulmonary circulation or increase capillary permeability—most commonly left-sided heart failure or volume overload—causing plasma to leak into the lung tissue. The result is shortness of breath and crackles on exam, and imaging often shows interstitial edema that can progress to alveolar flooding. Other options describe fluid in other compartments or infectious/inflammatory processes (pleural inflammation, TB, pneumonia) that don’t primarily reflect fluid accumulation in the lung’s extravascular spaces, making pulmonary edema the best match for this description.

Fluid accumulation outside blood vessels is edema. When this occurs in the lungs, it becomes pulmonary edema, with fluid collecting in the lung interstitium and, if it advances, the alveolar spaces. This pattern usually follows conditions that raise pressures in the pulmonary circulation or increase capillary permeability—most commonly left-sided heart failure or volume overload—causing plasma to leak into the lung tissue. The result is shortness of breath and crackles on exam, and imaging often shows interstitial edema that can progress to alveolar flooding. Other options describe fluid in other compartments or infectious/inflammatory processes (pleural inflammation, TB, pneumonia) that don’t primarily reflect fluid accumulation in the lung’s extravascular spaces, making pulmonary edema the best match for this description.