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Writer's pictureDr. Simon Luk

Understanding Biopsies: A Crucial Step in Diagnosing Suspicious Lesions




When it comes to skin health, paying attention to any changes in your skin is essential. Suspicious lesions, such as unusual moles or growths, should never be ignored. In many cases, your GP may recommend a biopsy to determine the nature of the lesion and whether it poses any health risks. In this article, we will explore why biopsies are necessary, the types of biopsies available—namely punch, shave, and excisional biopsies—and how each procedure is performed.


Why Biopsy?

A biopsy is a diagnostic procedure used to obtain a small sample of tissue from a suspicious lesion for examination under a microscope. It is a crucial step in determining whether the lesion is benign (non-cancerous) or malignant (cancerous). Identifying the nature of the lesion helps your GP makes informed decisions about the most appropriate course of action for your health.


Types of Biopsies:

  1. Punch Biopsy:

  • A punch biopsy is a common method used to sample deeper layers of skin.

  • During the procedure, the doctor uses a small, circular tool to remove a cylindrical core of tissue.

  • Typically performed under local anesthesia, the area may require a few stitches afterward.

  1. Shave Biopsy:

  • Shave biopsies are often used for lesions that appear to be confined to the outer layers of the skin.

  • In this procedure, a scalpel is used to shave off the upper layers of the lesion.

  • Local anesthesia is usually administered, and stitches may or may not be required, depending on the depth of the shave.

  1. Excisional Biopsy:

  • An excisional biopsy involves removing the entire lesion, along with a margin of normal tissue around it.

  • This type of biopsy is often recommended when your doctor suspects the entire lesion needs to be examined.

  • Excisional biopsies are typically performed under local anesthesia and may require stitches.

How Biopsies Are Done:

Regardless of the type of biopsy, the procedure generally follows these steps:

  1. Preparation:

  • The doctor will clean the area and administer a local anesthetic to numb the region.

  1. Biopsy Procedure:

  • Depending on the type of biopsy, the doctor will use a punch tool, scalpel, or other instruments to obtain a tissue sample.

  1. Closure:

  • Stitches may be needed to close the wound, depending on the type of biopsy and the size of the lesion.

  1. Recovery:

  • After the biopsy, your doctor will provide instructions for wound care and any necessary follow-up appointments.


Biopsies are a crucial tool in diagnosing suspicious skin lesions, providing vital information for appropriate medical intervention. If your GP recommends a biopsy, it's important to follow through promptly. Early detection and diagnosis can significantly impact the effectiveness of subsequent treatment, emphasizing the importance of taking proactive steps in maintaining your skin health. Always consult with your GP for personalized advice and guidance tailored to your specific situation.

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