Skin Biopsy

  • Medical Author:
    Melissa Conrad Stöppler, MD

    Melissa Conrad Stöppler, MD, is a U.S. board-certified Anatomic Pathologist with subspecialty training in the fields of Experimental and Molecular Pathology. Dr. Stöppler's educational background includes a BA with Highest Distinction from the University of Virginia and an MD from the University of North Carolina. She completed residency training in Anatomic Pathology at Georgetown University followed by subspecialty fellowship training in molecular diagnostics and experimental pathology.

  • Medical Editor: William C. Shiel Jr., MD, FACP, FACR
    William C. Shiel Jr., MD, FACP, FACR

    William C. Shiel Jr., MD, FACP, FACR

    Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.

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Skin Cancer Diagnosis

A skin examination by a dermatologist is the way to get a definitive diagnosis of skin cancer. In many cases, the appearance alone is sufficient to make the diagnosis.

A skin biopsy is usually used to confirm a suspicion of skin cancer.

Quick GuideSkin & Health Pictures Slideshow: What Your Skin Says About Your Health

Skin & Health Pictures Slideshow: What Your Skin Says About Your Health

What is a skin biopsy?

A skin biopsy is the removal of a piece of skin for the purpose of further examination in the laboratory using a microscope. Skin biopsies are performed to diagnose a number of conditions. Biopsies are not meant to actually treat a skin condition.

Why is a skin biopsy performed?

Skin biopsy is most frequently done to diagnose a skin growth such as a mole, or a skin condition such as a rash. A skin biopsy can also be used to diagnose a cancer of the skin. A skin biopsy may be indicated when a mole or other marking on the skin has changed in its shape, color, or size.

What methods are used to obtain a skin biopsy?

Different techniques are used in different situations. Typically the biopsies are obtained after using local anesthetics to numb the area to be biopsied.

  • A shave biopsy takes a thin slice off the top of the skin to be examined under the microscope.
  • A punch biopsy takes a core (a small cylindrical fragment of tissue from the area of interest) and can be used to diagnose rashes and other conditions.
  • Excisions are usually larger and deeper and are used to completely remove an abnormal area of skin such as a skin cancer. These are not technically biopsies since the goal of this procedure is to remove the whole lesion rather than to remove a small portion to make a diagnosis.

What happens to the skin sample after the biopsy is removed?

After the biopsy, the skin sample is fixed in special solution, and thin sections of the tissue are cut and placed on microscope slides. The slides are stained for examination by a doctor (usually a dermatologist or pathologist). Sometimes specialized stains are used to examine for antibodies, immune proteins, and other markers of certain diseases. Initial routine biopsy results can be obtained in 48 hours or less, while specialized staining techniques can require a much longer time until final results are available.

Normal Skin Illustration - Skin Biopsy
Normal Skin Illustration - Skin Biopsy

Medically reviewed by Norman Levine, MD; American Board of Dermatology

REFERENCE:

"Skin biopsy techniques"
uptodate.com

Medically Reviewed by a Doctor on 6/11/2015

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