dermatologist inspecting mole

Skin Biopsies: What You Need To Know

Why would I need a skin biopsy?

Our team of dermatology providers are very familiar with all skin cancers and how to treat them. During your routine annual skin cancer screening, your dermatologist might feel that you have a suspicious mole or place on your skin where they want to perform a skin biopsy. 

We wanted to share with you the different types of biopsies we routinely do to get the most accurate results.

What is a biopsy?

A biopsy is a removal of a sample of skin. That skin is then reviewed under a microscope and tested for skin cancer. If skin cancer does exist, a biopsy will also give the dermatologist a better understanding of which type of skin cancer it is and how deep the tumor is. 

What are the different types of skin biopsies?

Our dermatologists perform three main types of biopsies to diagnose skin cancer. They are:

  • Shave biopsy
  • Punch biopsy
  • Excisional biopsy

The type of biopsy your dermatologist chooses to perform depends on multiple factors. This reasoning can be related to their suspicions of what type of skin cancer it is and how deep they suspect it might be.

Let’s examine each of these types of skin biopsies in more detail.

Shave Biopsy

A shave biopsy is when a dermatologist takes a scalpel and gently shaves off a portion of the suspicious area to be examined.

Punch Biopsy

A punch biopsy is when a dermatologist uses a tube-shaped tool to take a punch size of tissue from the suspicious area. 

Excisional Biopsy

An excisional biopsy is when the dermatologist removes the lump or entire area of suspicion to test the entire piece of tissue. 

What can I expect during a skin biopsy?

Most skin biopsies are done right there at the dermatology clinic. Here are some common steps we take to prepare you for a skin biopsy:

First, we clean the area where the biopsy will take place.

Next, we anesthetize the area where the biopsy will take place with a fine needle. We do this because we want the procedure to be entirely pain-free for our patients.

The anesthetic we use is usually lidocaine, which will completely numb the area affected by the biopsy. Depending on the patient and the circumstance, we can apply a topical anesthetic before the procedure to further aid in potential pain post-procedure.

Once we perform the biopsy, the dermatologist can do a variety of things to stop the bleeding, involving either ointments or a small instrument that can give the area an electrical zap to cauterize the wound, to prevent it from bleeding

Some biopsies will require a stitch or two, which is performed right at the dermatology clinic.

Hopefully, this detailed information about the different types of skin biopsies will educate you on what to expect, comfort your potential fears, and arm you with knowledge so you can have peace of mind.


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