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Definition:

A cytology examination of pleural fluid is a laboratory test to detect cancerous cells in the pleural space, the area that surrounds the lungs.

See: Cytologic evaluation



Alternative Names:

Pleural fluid cytology



How the test is performed:

A sample of fluid from the pleural space is needed. For information on how the sample is obtained, see: Thoracentesis

The fluid sample is sent to a laboratory where it is examined under the microscope to determine what the cells look like, and whether they are abnormal. "Cytology" refers to the study of cells.



How to prepare for the test:

The laboratory test requires no preparation. For information on how to prepare for removal of the fluid sample, see: Thoracentesis



How the test will feel:

See: Thoracentesis



Why the test is performed:

A cytology exam is often used to look for cancers and precancerous changes. Your doctor may order a cytology examination of pleural fluid if you have signs of cancer, or to find the cause of fluid build-up in the pleural space, a condition called pleural effusion .



Normal Values:

Normal cells are seen.



What abnormal results mean:

In an abnormal test, there are cancerous (malignant) cells. This may mean there is a cancerous tumor . This test most often detects:

This test may also be done for cancer that has spread to the lung .



What the risks are:

There are no risks involved with a cytology exam.

For information risks related to the procedure to remove a sample of pleural fluid, see: Thoracentesis



Special considerations:



References:

Abeloff MD, Armitage JO, Niederhuber JE, Kastan MB, McKenna WG. Clinical Oncology. 4th ed. Philadelphia, Pa:Churchill Livingstone; 2004.

Light RW. The undiagnosed pleural effusion. Clin Chest Med. June 2006;27:309-319.




Review Date: 9/13/2008
Reviewed By: Benjamin Medoff, MD, Assistant Professor of Medicine, Harvard Medical School, Pulmonary and Critical Care Unit, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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