A pleural effusion is a buildup of fluid between the layers of tissue that line the lungs and chest cavity.
The body produces pleural fluid in small amounts to lubricate the surfaces of the pleura. This is the thin tissue that lines the chest cavity and surrounds the lungs. Pleural effusion is an abnormal, excessive collection of this fluid.
There are two types of pleural effusion:
Risk factors of pleural effusion may include:
Symptoms can include any of the following:
Sometimes there are no symptoms.
Your health care provider will examine you and ask about your symptoms. The provider will also listen to your lungs with a stethoscope and tap (percuss) your chest and upper back.
Chest CT scan or a chest x-ray may be enough for your provider to decide on treatment.
Your provider may want to perform tests on the fluid. If so, a sample of fluid is removed with a needle inserted between the ribs. Tests on the fluid will be done to look for:
Blood tests that may be done include:
If needed, these other tests may be done:
The goal of treatment is to:
Removing the fluid (thoracentesis) may be done if there is a lot of fluid and it is causing chest pressure, shortness of breath, or a low oxygen level. Removing the fluid allows the lung to expand, making breathing easier.
The cause of the fluid buildup must also be treated:
In people with cancer or infection, the effusion is often treated by using a chest tube to drain the fluid and treating its cause.
In some cases, any of the following treatments are done:
The outcome depends on the underlying disease.
Complications of pleural effusion may include:
Call your provider or go to the emergency room if you have:
Reviewed By: Denis Hadjiliadis, MD, MHS, Paul F. Harron, Jr. Associate Professor of Medicine, Pulmonary, Allergy, and Critical Care, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.