What is another name for pleural effusion?

Pleural effusion refers to the abnormal accumulation of fluid in the pleural space surrounding the lungs. The term "hydrothorax" specifically denotes a type of pleural effusion that involves a transudative fluid, which is typically clear and is seen in conditions such as heart failure or cirrhosis. This terminology emphasizes the nature of the fluid involved and its impact on the pleural cavity.

In contrast, ascites pertains to fluid accumulation in the abdominal cavity rather than the pleural space and is commonly associated with liver disease. Pneumothorax refers to the presence of air in the pleural space, which is a separate condition that can lead to lung collapse. Chylothorax is another type of pleural effusion but involves lymphatic fluid, particularly after injury to lymphatic vessels or due to certain diseases.

Thus, calling pleural effusion "hydrothorax" helps to differentiate it from other types of fluid collections in the body while accurately describing the fluid's characteristics.