Skin lesion aspiration
Skin lesion aspiration is the withdrawal of fluid from a skin lesion (sore).
How the Test Is Performed
The health care provider inserts a needle into the skin sore or
If the sore is deep, the provider may inject numbing medicine (anesthetic) into the skin before inserting the needle.
How to Prepare for the Test
You do not need to prepare for this test.
How the Test will Feel
You may feel a pricking sensation as the needle enters the skin.
In many cases, removing the fluid will lessen pressure within the skin sore and ease pain.
Why the Test Is Performed
This test is used to find the cause of a fluid-filled skin lesion. It can be used to diagnose skin infections or cancers.
What Abnormal Results Mean
Abnormal results may be a sign of infection caused by bacteria, fungi, or viruses. Cancer cells may also be seen.
There is a small risk of bleeding, mild pain, or infection.
Chernecky CC, Berger BJ. Biopsy, site-specific - specimen. In: Chernecky CC, Berger BJ, eds. Laboratory Tests and Diagnostic Procedures. 6th ed. St Louis, MO: Elsevier Saunders; 2013:199-202.
Marks JG, Miller JJ. Dermatologic therapy and procedures. In: Marks JG, Miller JJ, eds. Lookingbill and Marks' Principles of Dermatology. 6th ed. Philadelphia, PA: Elsevier; 2019:chap 4.
Review Date: 10/14/2018
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed physician 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. Copyright ©2019 A.D.A.M., Inc., as modified by University of California San Francisco. Any duplication or distribution of the information contained herein is strictly prohibited.
Information developed by A.D.A.M., Inc. regarding tests and test results may not directly correspond with information provided by UCSF Health. Please discuss with your doctor any questions or concerns you may have.