Why Biopsy Done: What a Biopsy Test Means for Cancer Diagnosis

A biopsy is done to take a small sample of tissue or cells from the body and examine it in a laboratory, so a pathologist can tell what a growth actually is. Scans show that something is there, how big it is and where it sits; a biopsy is usually what confirms whether it is cancer, which type of cancer it is, and which treatments may be relevant.

For cancer patients and families in Hyderabad and India, and for international patients seeking a second opinion, the biopsy report is often the single most important document in the treatment plan. It informs the diagnosis, the stage, and the choice of chemotherapy, targeted therapy, immunotherapy or hormonal therapy, as well as whether surgery or radiation may be needed.

This page explains in plain language why a biopsy is done, how a biopsy test is done (biopsy test kaise hota hai), what happens to the biopsy sample, possible biopsy side effects, how long a biopsy report takes, and how to read a cancer report format. It is general information for patients and families, not personal medical advice.

• A biopsy is done to get a tissue diagnosis — it tells your doctor what the growth is, not only where it is.
• Imaging (CT, MRI, PET-CT, ultrasound) and biopsy answer different questions, and both are often needed.
• The biopsy procedure itself is performed by a surgeon, radiologist or other trained specialist — not by a medical oncologist.
• Most biopsy side effects are mild and short-lived, such as soreness, bruising or minor bleeding at the site.
• A routine biopsy report is often ready within a few working days; reports needing special stains or molecular tests can take longer.
• Cancer reports follow a fairly standard format, but no two reports are identical. Online “sample” reports are for learning, not for self-diagnosis.
• A brain tumour biopsy is often image-guided or done during surgery, and molecular testing of the tissue increasingly guides treatment.
• A second opinion on the biopsy report and the proposed plan can be requested before starting treatment.

A biopsy is done because a doctor needs to know the nature of an abnormal area, not just its appearance on a scan. A radiologist can describe a mass, a lymph node or a lesion on imaging, but only a pathologist examining tissue or cells can say what it is.

Scans and biopsies work together. A scan may show that a tumour has shrunk or grown, but a biopsy or pathology review explains what the tumour is made of.

A biopsy is usually advised when an imaging test or examination finds something suspicious that needs tissue confirmation. Common situations include:

• A lump, mass, skin lesion or enlarged lymph node of unknown cause.
• A suspicious finding on mammography, ultrasound, CT, MRI or PET-CT.
• A lesion in the lung, liver, bone, prostate, thyroid, breast, kidney or bowel.
• A blood picture, bone marrow finding or lymph node pattern that suggests a blood cancer such as lymphoma or leukaemia.
• A suspected cancer that has spread, where the treating team needs to confirm the type and origin.
• A condition that may not be cancer at all — infection, inflammation or an autoimmune process — where tissue helps rule cancer out.
• During or after treatment, in selected situations, to check how a disease is behaving.

Your treating team weighs the value of the information against the risk of the procedure for your specific case.

There are several types of biopsy. The one chosen depends on where the abnormal area is, how deep it lies, how large it is, and how safe it is to reach.

Your surgeon, radiologist or endoscopist performs the procedure. A medical oncologist reviews the result and plans and supervises non-surgical treatment such as chemotherapy, targeted therapy, immunotherapy and hormonal therapy.

A biopsy test is usually a short, planned procedure. Many biopsies are done under local anaesthesia; deeper or more complex ones may need sedation or general anaesthesia.

1. Preparation. Your team reviews your medicines, allergies, blood tests and imaging. You may be asked to stop certain blood-thinning medicines for a period, only if your doctor advises it.
2. Positioning and imaging. You are positioned comfortably. For many biopsies, ultrasound, CT or another imaging method guides the needle to the exact spot.
3. Local anaesthesia. The skin and deeper tissue at the site are numbed. You may feel pressure rather than sharp pain.
4. Sample collection. The needle, instrument or small incision is used to collect the sample. This part often takes only a few minutes.
5. Site care. Pressure is applied, and a small dressing is placed. Some patients need a short observation period afterwards.
6. Recovery. For small biopsies, many people go home the same day with written instructions. Deeper or surgical biopsies may need a short hospital stay.
7. Reporting. The sample goes to the pathology laboratory, and the report is sent to your treating doctor.

Ask your team what to expect on the day: how long the procedure takes, whether you can eat beforehand, whether someone should accompany you, and when you can return to normal activities.

The biopsy sample is placed in a fixative (commonly formalin), labelled with your details, and sent to a pathology laboratory. There it is processed, cut into very thin sections, stained and examined under a microscope by a pathologist.

Depending on what is seen, the pathologist may also run:

• Special stains to highlight specific cells or structures.
• Immunohistochemistry (IHC) to identify proteins on cells, which helps confirm the tumour type or origin.
• Molecular or genetic tests on the tissue, when your oncologist needs information about markers or mutations that could guide treatment.

Each additional test adds time to the final report. That is one reason two patients with the same biopsy date can receive reports on different days.

Most people experience only mild, short-lived side effects at the biopsy site. Serious complications are uncommon but possible, and vary with the organ being sampled.

Common and usually minor

• Soreness or mild pain for a day or two.
• Bruising or a small swelling.
• A small amount of bleeding or spotting from the site.
• Feeling tired for a short while after sedation.

Less common

• Infection at the site.
• Bleeding that does not stop with pressure.
• Injury to a nearby structure.
• A collapsed lung after a lung biopsy (pneumothorax).
• For brain biopsies, bleeding, swelling, seizures or a new neurological symptom.

When to contact the hospital

• Fever, chills or increasing redness and warmth at the site.
• Bleeding that does not stop, or a rapidly growing swelling.
• Severe or worsening pain.
• Shortness of breath or chest pain after a lung biopsy.
• Any new weakness, confusion, severe headache or seizure after a brain procedure.

Follow the after-care instructions given to you: keep the site clean and dry as advised, avoid heavy lifting or strenuous activity for the period your team recommends, and take medicines only as prescribed.

Timelines vary by hospital, by the type of biopsy and by the tests requested. As a general guide, a routine biopsy report is often ready within a few working days, while reports that need immunohistochemistry or molecular testing can take one to two weeks or longer.

These are general patterns, not promises. Delays can happen if a repeat test, extra stain or specialist review is needed. The most reliable answer comes from your own hospital’s pathology laboratory — ask them for an estimated date when you leave the biopsy room.

Most cancer biopsy reports follow a similar structure, but the wording is technical and should be explained by your treating oncologist. A typical report may include:

• Patient and specimen details — name, age, hospital number, the exact site sampled and how many pieces were received.
• Clinical history — the question your doctor asked of the pathologist.
• Gross description — what the sample looked like to the naked eye.
• Microscopic description — what was seen under the microscope.
• Diagnosis — the main line that names the tumour type, such as adenocarcinoma, squamous cell carcinoma or lymphoma.
• Grade and differentiation — how much the cells resemble normal tissue.
• Immunohistochemistry (IHC) — marker results that support the diagnosis.
• Molecular or genetic findings — where such testing was done.
• Margins, lymph nodes, lymphovascular invasion — features that help with staging and treatment planning.
• Comment or note — the pathologist’s interpretation and any recommendation for further testing.

A cancer report sample or tumour report sample found online may not match your cancer type, your laboratory’s format or the staging system used for your disease. Use such samples only to understand the vocabulary. Do not use them to diagnose yourself, estimate your prognosis, or change treatment.

For a patient-friendly walkthrough, see Understanding Your Biopsy Report: A Plain-English Guide for Patients.

A brain tumour biopsy removes a very small amount of tissue from inside the skull, usually with image guidance (a stereotactic biopsy) or during a planned brain operation (craniotomy).

Points that matter for patients and families:

• The procedure is performed by a neurosurgeon, sometimes with the patient awake for part of it so that neurological function can be monitored.
• The risks are specific to the brain and include bleeding, swelling, infection, seizures and temporary or permanent neurological symptoms.
• A biopsy may be the only way to know the tumour type when the tumour sits in an area that cannot be safely removed.
• Molecular testing of brain tumour tissue increasingly guides treatment choices, so the tissue sample is valuable beyond the diagnosis.
• Brain tumour care usually involves a multidisciplinary team — neurosurgeons, radiation oncologists, medical oncologists, pathologists and supportive care specialists.

If you are seeking a second opinion on a brain tumour, bring the biopsy or surgery pathology report, the molecular report if available, and the MRI or CT images or reports.

A tissue biopsy removes cells or a piece of tissue from the body, while a liquid biopsy is a blood test that looks for cancer-related material circulating in the blood.

A tissue biopsy is usually needed to confirm a new diagnosis. A liquid biopsy may be considered in selected situations, such as when a tissue biopsy is not safe or not possible, or when a known cancer is being monitored over time. It does not replace tissue biopsy in every case, and the choice depends on the cancer type and the clinical question.

You can read more here: Liquid Biopsy for Cancer in Hyderabad.

A second opinion means a second oncologist reviews your biopsy report, scans, blood tests and the proposed plan, and explains the options in plain language.

What to send for review

• The biopsy or surgical pathology report, including immunohistochemistry.
• Molecular or genetic test reports, if done.
• Scan reports, and images on CD or film if available.
• Blood test reports and any treatment summary or prescription.
• A short note on your symptoms, when they started and what has been done so far.

Who reviews it

Dr. Harish Kancharla is a medical oncologist and hemato-oncologist. He is Senior Consultant, Medical Oncology and Hemato-Oncology, at Yashoda Hospitals, Somajiguda, Hyderabad, and has worked there since 2021. His qualifications are DM (Medical Oncology) from AIIMS, New Delhi, and MD (Internal Medicine) from PGIMER, Chandigarh. He is registered with the Telangana State Medical Council, registration number 77186, and consults in English, Hindi and Telugu.

He treats solid tumours, blood cancers and rare cancers, and plans and supervises chemotherapy, targeted therapy, immunotherapy and hormonal therapy. Chemotherapy is given as day care or inpatient treatment at Yashoda Hospitals, Somajiguda. Surgery and radiation are provided by surgical and radiation oncologists in the hospital’s multidisciplinary team, not by Dr. Kancharla.

How to arrange it

• Patients can send biopsy, scan and blood reports on WhatsApp at +91 70322 44487 for review before a consultation.
• In-person consultations are at Yashoda Hospitals, Somajiguda, Hyderabad.
• Online video consultations are available for patients outside Hyderabad and outside India.
• For international patients, the first consultation is online; treatment then continues in person at Yashoda Hospitals, Somajiguda.
• Enquiries can also be made by phone on +91 70322 44487, by email at contact@indianoncocare.com, or through the enquiry form on the website.

A second opinion does not commit you to changing doctors or treatment. It is a way to understand your options before decisions are made.

• What exactly did the biopsy show, and in simple words, what does that mean?
• Is any further testing needed on the sample, such as immunohistochemistry or molecular tests?
• Do we need to repeat the biopsy, and if so, why?
• What is the stage of the disease, and what information is still missing?
• Which treatments are being considered, and what is the goal of each one?
• Are there tests I should do before starting treatment?
• What symptoms or side effects should make me call the hospital immediately?
• When is the next review, and what will we be checking then?

A scan shows the size, position and behaviour of a growth, but it cannot confirm what the growth is made of. A biopsy gives a tissue diagnosis — the cancer type, subtype and sometimes markers that guide treatment. That information is usually needed before starting chemotherapy, targeted therapy, immunotherapy or hormonal therapy.

It varies. In many hospitals, a routine biopsy report is ready within a few working days. If immunohistochemistry, molecular testing or a specialist review is needed, the report can take one to two weeks or longer. Ask your hospital’s pathology laboratory for an estimated date when the sample is taken.

Most people notice only mild, short-lived effects at the biopsy site, such as soreness, bruising or a small amount of bleeding. Less commonly, infection, persistent bleeding or injury to a nearby structure can occur. Brain and lung biopsies carry their own specific risks. Contact your hospital if you have fever, bleeding that does not stop, severe pain, breathlessness or any new neurological symptom.

If you have a biopsy report and want to understand it before deciding on treatment, you can send your biopsy, scan and blood reports on WhatsApp at +91 70322 44487 for review. Consultations are available in person at Yashoda Hospitals, Somajiguda, Hyderabad, and online for patients outside Hyderabad and outside India. You can also call +91 70322 44487, email contact@indianoncocare.com, or use the enquiry form on the website. Dr. Kancharla consults in English, Hindi and Telugu.

This article is general health information for patients and families. It is not a substitute for personal medical advice, diagnosis or treatment. Please discuss your own reports and options with your treating doctor.