The skin lesion KOH exam is a test to diagnose a fungal infection of the skin .
Potassium hydroxide examination of skin lesion; Fungal wet prep
How the test is performed:
The health care provider scrapes the lesion off your skin, using a blunt edge such as the edge of a microscope slide. The scrapings from the skin lesion are placed in liquid containing potassium hydroxide (KOH) and examined under the microscope. KOH destroys all non-fungal cells, which makes it easier to see if there is any fungus present.
How to prepare for the test:
There is no special preparation for the test.
How the test will feel:
You may feel pressure when the doctor scrapes the lesion off your skin.
Why the test is performed:
This test is done to diagnose a fungal infection of the skin.
Normally, there is no fungus.
What the risks are:
There is a small risk of bleeding or infection from scraping the lesion.
|Review Date: 4/15/2009|
Reviewed By: Jonathan Kantor, M.D., North Florida Dermatology Associates, Jacksonville, FL. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
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