Biopsy of Swelling or Lump on the Body

What a Lump or Swelling on the Body May Represent

A lump or swelling under the skin, or in a deeper tissue such as the breast, neck, groin or armpit, can have many possible causes. Some of the common possibilities include:

• Cysts — fluid-filled sacs, such as sebaceous or epidermal cysts
• Lipomas — soft, fatty growths under the skin, usually slow-growing
• Infections and abscesses — collections of pus that may be warm, tender and red
• Inflammatory swellings — related to injury, infection or an immune reaction
• Benign tumours — non-cancerous growths of soft tissue, nerve, blood vessel or gland
• Enlarged lymph nodes — which may be reactive, infective or, less commonly, related to a serious condition
• Cancerous growths — in some cases a lump may be due to a malignant condition, and this needs proper evaluation

It is important to understand that the appearance and feel of a lump alone cannot always tell us what it is. A definite diagnosis often needs a clinical examination, appropriate imaging, and — where indicated — a biopsy.

When You Should Seek Medical Evaluation

You should consider seeing a doctor if you notice any of the following:

• A new lump that persists beyond a few weeks
• A lump that is gradually growing in size
• A hard, fixed or painless lump — especially one that does not move freely
• Changes in the overlying skin such as redness, ulceration, discolouration or discharge
• Associated symptoms like unexplained weight loss, persistent fever or night sweats
• A lump in the breast, neck, groin, armpit or testicle
• A previously stable lump that suddenly changes in size, shape or character

What is a Biopsy?

A biopsy is a procedure in which a small piece of tissue is removed from a swelling so that it can be examined under a microscope by a pathologist. This microscopic examination — called histopathology — helps to identify the type of cells in the lump and to make an accurate diagnosis. Depending on the situation, the pathologist may also carry out special tests on the sample to give more information about the exact nature of the disease.

A biopsy is a diagnostic tool. It does not, by itself, treat the swelling; its main purpose is to give a clear answer about what the swelling is, so that the correct next steps can be planned.

Types of Biopsy

Different types of biopsy are used depending on the size, location and character of the swelling. The surgeon chooses the most appropriate technique for the individual patient.

How the Decision is Made

The choice of biopsy is individualised. The surgeon considers factors such as:

• Site and depth of the swelling
• Size and character of the lump — firm, cystic, mobile or fixed
• Findings on ultrasound or other imaging
• Overall health, medications and clotting status
• Whether the aim is only to make a diagnosis or also to remove the lump

For some superficial and clearly benign-looking swellings, an excisional biopsy may be planned so that the lump is both removed and examined at the same time. For larger, deeper or suspicious lumps, an FNAC or core biopsy is often done first to plan further treatment.

What Happens During the Biopsy Procedure

A typical biopsy of a superficial swelling follows these general steps:

• Consent and explanation — the procedure, expected report timeline and possible risks are explained.
• Positioning and cleaning — the area over the lump is cleaned with antiseptic and covered with a sterile drape.
• Local anaesthesia — in most cases, a small injection of local anaesthetic is used to numb the area. You may feel a brief prick but not the biopsy itself.
• Taking the sample — the appropriate needle or small surgical incision is used to obtain the tissue sample.
• Wound care — a small dressing is applied. Sutures are placed if needed, depending on the type of biopsy.
• Discharge — most patients go home the same day with instructions on dressing care, medication and follow-up.

Larger or deeper biopsies may occasionally need sedation or general anaesthesia and short admission, particularly for lumps in difficult locations.

What Happens to the Tissue Sample

The tissue sample is placed in a preservative solution and sent to the pathology laboratory. There, thin sections are prepared, stained, and examined by a pathologist under the microscope. In many cases, additional tests such as immunohistochemistry (IHC) or special stains may be carried out to characterise the disease more precisely. A standard histopathology report is usually available within a few days, while reports involving special tests may take up to two weeks or more, depending on what is required.

Why Histopathology May Be Needed

Histopathology gives a definitive tissue-level diagnosis, which is often not possible from clinical examination or imaging alone. This is important because:

• It helps confirm whether the swelling is benign or something that needs further treatment
• It guides the next step — for example, simple removal, further surgery, or referral to a specialist
• It provides useful information for planning if additional treatment such as further surgery, oncology consultation or medical therapy is required

After the Biopsy

Most patients feel only mild soreness at the biopsy site for a day or two. General advice usually includes:

• Keep the dressing clean and dry as advised
• Take prescribed pain relief or antibiotics as instructed
• Avoid strenuous activity involving the biopsy site until healing is well underway
• Watch for signs of infection such as increasing pain, redness, warmth, swelling or discharge — and inform your surgeon if these occur
• Attend the follow-up visit for wound review, suture removal (if applicable) and discussion of the biopsy report

What if the Report Shows a Serious Condition?

If the biopsy report suggests a serious condition, your surgeon will explain the findings clearly and discuss the next steps with you. This may include further imaging, additional tests, and a referral to a surgical oncologist or medical oncologist as appropriate. Treatment planning is always individualised — it depends on the exact diagnosis, the stage of the disease and the patient's overall condition. The aim of the biopsy at this stage is simply to give you and your treating team the correct information to move forward with the right plan.

Frequently Asked Questions