What is a Biopsy? Procedures, Benefits, and What to Expect

What is a Biopsy? Procedures, Benefits, and What to Expect

A biopsy is a medical procedure where a small sample of tissue is removed from the body so it can be examined closely under a microscope.

It is the “gold standard” for diagnosis, allowing doctors to see exactly what is happening at a cellular level.

Biopsies can be performed on almost any part of the body, from the skin and breasts to internal organs like the liver or kidneys.

Why Do I Need a Biopsy?

If a doctor or nurse identifies an abnormality—such as a lump found during a physical exam or a “shadow” on a CT scan—they need to investigate further.

A biopsy is essential because a lump or lesion can have many different causes, including:

• Infection or inflammation.

• Benign (non-cancerous) growths, such as cysts or fibroids.

• Malignancy (cancer).

Beyond checking for cancer, biopsies are also performed on organs to determine why they aren’t functioning correctly.

Common examples include a kidney biopsy to investigate chronic kidney disease or a bone marrow biopsy to check for blood disorders like anaemia.

How is a Biopsy Performed?

The method used depends entirely on where the tissue is located. Most biopsies are performed as “day cases,” meaning you go home the same day.

• Needle Biopsy: A thin, hollow needle is used to extract tissue or fluid. This is common for breast lumps or thyroid nodules.

• Skin Biopsy: A small piece of a skin lesion is removed using a circular blade or a scalpel.

• Endoscopic Biopsy: During procedures like a colonoscopy, a doctor uses tiny tools passed through a flexible tube to snip a sample from the lining of the gut.

• Surgical Biopsy: A surgeon may remove a larger piece of tissue (or the entire lump) during an operation.

Pain Management: To ensure your comfort, biopsies are performed using local anaesthetic (to numb the area), sedation, or occasionally general anaesthetic.

Who Performs the Procedure?

Depending on the location of the sample, your biopsy may be carried out by:

1. A Specialist Surgeon: Often done in a clinic (like a breast clinic) or an operating theatre.

2. An Interventional Radiologist: A doctor who specializes in using imaging (like Ultrasound or CT) to guide a needle precisely to the target area.

3. A Hospital Physician: e.g. Gastroenterologist, Chest physician, Dermatologoist, Haematologist or Nephrologist.

Potential Risks and Complications

While biopsies are generally very safe and routine, like any medical procedure, there are some risks:

• Inadequate Sample: Occasionally, not enough tissue is collected to provide a definitive answer. In these cases, the biopsy may need to be repeated.

• Technical Issues: Problems can occur during the laboratory processing of the tissue.

• Bleeding: Some bleeding is normal at the site. While it usually stops on its own, internal bleeding from an organ biopsy may rarely require further treatment or surgery.

• Infection: As with any procedure that breaks the skin, there is a very small risk of infection.

What Happens After a Biopsy?

Once the tissue is taken, it is sent to a pathologist (a doctor who studies tissues and cells).

• The Wait Time: It usually takes at least 2 weeks to get your results. Specialist tests or molecular staining can take longer.

• Getting Results: Your results are typically discussed at your next clinic appointment. If your biopsy was part of a 2-week wait cancer referral, the process is usually expedited.

The Takeaway: A biopsy is the most accurate way for your medical team to give you a definitive diagnosis and ensure you receive the most effective treatment.

Further Reading

• NHS: Biopsy Overview

• Understanding Cancer Diagnosis