Skin lesion biopsy
Alternative names:
biopsy of the skin; punch biopsy; skin biopsy; skin scraping
How the test is performed:
There are 3 methods for obtaining the skin sample. The test is usually done at the health care provider's office. In a shave biopsy, the outer part of the suspect skin area is removed. A local anesthetic is injected. Then a sharp scalpel is used to cut off a growth protruding from the normal skin.
In a punch biopsy, a small cylinder of skin is removed. A local anesthetic is injected. The skin around the biopsy site is pulled tight and a punch (a hollow instrument) is firmly introduced into the skin and rotated to obtain a sample; then the punch is removed. If a large sample is taken, the area may be closed with stitches.
In an excision biopsy, the entire suspect area is removed. A local anesthetic is injected. Then the entire lump, spot, or sore is removed, going as deep as necessary to get the entire area. The incision is then closed with stitches. Bleeding is controlled by pressure. If a large area is biopsied, a skin graft may be used to cover it.
How to prepare for the test:
Inform the doctor of any allergies to medication, which medications you are taking, if you have bleeding problems, and if you are pregnant. You must sign a consent form.
Infants and children:
The physical and psychological preparation you can provide for this or any test or procedure depends on your child's age, interests, previous experience, and level of trust. For specific information regarding how you can prepare your child, see the following topics as they correspond to your child's age:
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:
The test is used to identify cancers and benign growths, to help diagnose chronic bacterial and fungal skin infections, and to identify other skin conditions.
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