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Skin lesion biopsy Health Article

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Definition

A skin lesion biopsy is the removal of a piece of skin to diagnose or rule out an illness.

Alternative Names

Punch biopsy; Shave biopsy; Skin biopsy; Biopsy - skin

How the test is performed

There are several ways to do a skin biopsy. Most procedures can be easily done in outpatient medical offices or your doctor's office.

Which procedure you have depends on several factors, including the location, size, and type of lesion. You will receive some type of numbing medicine (anesthetic) before any type of skin biopsy.

Types of skin biopsies include:

Shave biopsy
Punch biopsy
Excisional biopsy

The shave biopsy is the least invasive of all three techniques. Your doctor will remove the outermost layers of skin. You will not need stitches.

Punch biopsies are most often used for deeper skin lesions. Your doctor removes a small round piece of skin (usually the size of a pencil eraser) using a sharp, hollow instrument. If a large sample is taken, the area may be closed with stitches.

An excisional biopsy is done to remove the entire lesion. A numbing medicine is injectedinto the area. Then the entire lump, spot, or sore is removed, going as deep as necessary to get the entire area. The area is closed with stitches. Pressure is applied to the area to stop any bleeding. If a large area is biopsied, a skin graft or flap of normal skin may be used to replace the skin that was removed.

How to prepare for the test

Tell your health care provider:

About the medications you are taking (including vitamins and supplements, herbal remedies, and over-the-counter preparations)
If you have any allergies
If you have bleeding problems
If you are pregnant

How the test will feel

There is a brief prick and sting as the anesthetic is injected. Afterward, the area may be tender.

Why the test is performed

Your doctor may order a skin biopsy if you have signs or symptoms of skin cancer, benign growths, chronic bacterial and fungal skin infections, or other skin condition.

Normal Values

Normal value ranges may vary slightly among different laboratories. Talk to your doctor about what your specific test results mean.

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Reviewer Info: Kevin Berman, MD, PhD, Associate, Atlanta Center for Dermatologic Disease, Atlanta, GA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.; ADAM Health Illustrated Encyclopedia, 02/05/2008