Effusion

Seeping of fluid into a body cavity or part.

The leakage of fluid from the tissue into a cavity, such as fluid in the pleural cavity.

A discharge of blood, fluid or pus into or out of an internal cavity.

Fluid, blood or pus which is discharged.

Escape of fluid (e.g., blood, lymph, serum) into a body cavity, often associated with circulatory or kidney disorders.

Fluid that accumulates in a body cavity. Effusion occurs when pus, serum, blood, lymph, or other fluid escapes into a body cavity as a result of inflammation or the presence of excess fluid in an organ or tissue. Types of effusion include hemorrhagic effusion, in which blood leaks into another body cavity; pericardial effusion, in which fluid accumulates in the sac surrounding the heart; and pleural effusion, in which fluid builds up between the layers of the pleural membranes surrounding the lungs.

The escape of pus, serum, blood, lymph, or other fluid into a body cavity as a result of inflammation or the presence of excess blood or tissue fluid in an organ or tissue.

The passage of fluid through the walls of a blood vessel into a tissue or body cavity. It commonly occurs as a result of inflammation or damage to the blood vessel. A pleural effusion may occur in heart failure (as a result of increased blood pressure in the veins forcing out fluid) or as a result of inflammation in the lung tissue (pneumonia). Effusions may also develop in damaged joints.

Escape of fluid into a part, as the pleural cavity, such as pyothorax (pus), hydrothorax (serum), hemothorax (blood), chylothorax (lymph), pneumothorax (air), hydropneumothorax (serum and air), and pyopneumothorax (pus and air).

It refers to an accumulation of fluid that has seeped into a specific body cavity or tissue.

Effusion refers to the process where fluid leaks out. It is also used to describe an unusual accumulation of fluid (like blood, pus, or plasma) within body tissues or cavities. This fluid build-up can occur due to inflammation, changes in blood vessel pressure, or alterations in blood components, such as those observed in nephrotic syndrome, a kidney-related condition.

Swelling often results from an effusion, which typically occurs around the lung or heart, or within the joints.