Renal biopsy

Renal biopsy in Turkey: what it is and why it is done

A renal biopsy, also called a kidney biopsy, is a procedure in which a doctor takes one or two thin cores of tissue from a kidney with a hollow needle so that a pathologist can examine them under a microscope. Blood tests, urine tests and scans show that something is wrong with the kidneys; the biopsy shows what kind of damage is present and why. That tells the nephrologist which disease it is, how active or scarred the tissue is, and which treatment is likely to help.

Doctors usually recommend it for protein or blood in the urine that has no clear cause, unexplained kidney failure, nephrotic syndrome, suspected lupus nephritis or other immune-related kidney disease, a decline in function of a transplanted kidney, or when a result would change treatment. This guide explains how the procedure is done, what the tissue tests show, what it costs in Turkey against the UK, US and Germany, what recovery involves and how to check a unit. Urology and nephrology services in Turkey are grouped in our overview of urology treatments in Turkey.

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When is a kidney biopsy needed, and when is it not?

A biopsy is not routine. It is considered when the result will change what the doctor does, because the procedure carries a small but real risk of bleeding. It is most helpful when the cause of kidney disease is uncertain or when the pattern could point to several conditions that are treated very differently, for example immune-related disease that needs medicines to damp down the immune system compared with damage from diabetes or high blood pressure. It is less useful when the kidneys are very small and scarred, because the tissue is mostly scar and the result rarely changes the plan; when the cause is already clear from other tests; or when it is unsafe, for example if blood pressure cannot be controlled, if the blood does not clot normally, or if there is only one kidney and the risk is judged too high. Your nephrologist should explain why the biopsy is advised and what you would do differently depending on the result.

How is a renal biopsy done, step by step?

The most common method is a percutaneous needle biopsy under ultrasound guidance, done while you are awake.

1. Preparation: blood tests check clotting and blood count, blood pressure is checked and treated if high, and medicines that thin the blood or affect clotting are paused as advised.
2. Position: you lie on your front, or on your back if the kidney is a transplant.
3. Local anaesthetic: the skin over the kidney is cleaned and numbed. Sedation is sometimes offered, particularly for anxious patients and children.
4. Sampling: using ultrasound to see the lower pole of the kidney, the doctor passes a spring-loaded biopsy needle and takes one to three cores of tissue. You are usually asked to hold your breath briefly for each sample, and you may feel pressure and hear a click.
5. Observation: pressure is applied, a dressing is placed, and you lie flat on your back for several hours while staff check pulse, blood pressure and urine.

The procedure itself takes about 20 to 30 minutes. Other approaches exist, such as a transjugular route through the neck vein, or a laparoscopic or open approach, which are reserved for people who cannot safely have the standard needle method.

What do the tissue tests show, and how long do results take?

The pathologist usually examines the sample in three ways: light microscopy for the structure of the filters and tubes, immunofluorescence to look for deposits of immune proteins, and electron microscopy for very fine changes in the filter membrane. Together they allow a precise diagnosis, such as IgA nephropathy, membranous nephropathy, minimal change disease, focal segmental glomerulosclerosis, lupus nephritis or transplant rejection. Preliminary findings are often available within a few days, while the full report with all three techniques usually takes about one to two weeks. Ask the unit how and when the report will reach you, and request a copy in English or Turkish with the slides or images, so your own nephrologist at home can review it.

Renal biopsy cost in Turkey compared with the UK, US and Germany

The figures below are approximate ranges for the biopsy including the pathology, not hospital quotes. Each hospital confirms its own price in a written plan after reviewing your records.

What changes the renal biopsy price: the setting (day-case or overnight stay), whether sedation is used, native or transplant kidney, how many tissue techniques the pathology laboratory runs (electron microscopy and immunofluorescence add cost), the pre-procedure blood tests and scans, and whether a nephrologist consultation is included. A package normally lists the consultation, the pre-biopsy tests, the procedure, observation, the pathology report and a follow-up discussion of the result; ask for each item in writing, and for the cost of a second opinion on the slides.

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Is a renal biopsy painful?

The needle track is numbed, so most people feel a sting from the anaesthetic, then pressure and a brief click rather than sharp pain. Afterwards it is common to have a dull ache at the biopsy site or in the back for a day or two, which simple painkillers such as paracetamol usually control; the unit will tell you which painkillers to avoid, as medicines such as ibuprofen can increase bleeding. Pain that is severe or getting worse, especially with dizziness, is not usual and needs to be reported at once.

Needle biopsy compared with other ways to learn about kidney disease

A biopsy is only one tool, and not always the right one. Blood and urine tests (creatinine, eGFR, protein-to-creatinine ratio, specific antibodies) and kidney ultrasound or other imaging are done first. A biopsy is added when these leave the diagnosis unclear.

For other kidney and urinary conditions treated in the same specialty, see kidney stone removal, ureteroscopy and cystoscopy; urology departments also treat conditions such as circumcision and penis enlargement, which have nothing to do with kidney disease.

Trip length and recovery: how long to stay and what to avoid

For a standard needle biopsy most units keep you under observation for about four to six hours, and many ask for an overnight stay, because most bleeding complications show up within the first 24 hours. After discharge, plan to stay near the hospital for at least a day or two so that you can return quickly if there is a problem, and to remain in Turkey until the pathology report is ready if you want the result explained face to face. For about one to two weeks avoid heavy lifting, vigorous exercise, contact sports and straining; walking and light activity are fine, and many people return to desk work after a few days. Ask your doctor whether and when you can fly, because flying soon after the biopsy is generally advised against until the team is satisfied there is no bleeding. Drink as advised and report blood in the urine that does not clear or contains clots.

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Risks and complications of a kidney biopsy

Bleeding is the main risk. Many people see pink or red urine for a day or two, which usually settles by itself. A collection of blood around the kidney (haematoma) is more common, and often causes no symptoms. Serious bleeding that needs a transfusion, or a procedure to stop it, is uncommon, and removal of the kidney is very rare. Other risks include pain, infection, injury to a nearby organ, a connection between an artery and a vein in the kidney (usually harmless), and anaesthetic or sedation effects. The NHS and kidney charities describe the biopsy as a generally safe procedure when carried out by an experienced team, with the risk lowest in those with normal blood pressure and clotting. A good unit will explain the risks for your own situation before you agree.

How to choose a hospital, and questions to ask

Look for a hospital with a nephrology department, ultrasound-guided biopsy performed by an experienced nephrologist or interventional radiologist, access to blood bank and critical care if bleeding occurs, and a pathology laboratory that can run immunofluorescence and electron microscopy. You should receive a written plan and price before paying a deposit. Red flags include no review of your clotting and blood pressure, no overnight observation option, a quoted price without pathology included and any pressure to decide quickly. Read how our process works and ask for a plan through our free quote page. Useful questions:

• Which blood tests will be done first, and which medicines must I stop?
• Who performs the biopsy, and how many do they do each year?
• How long will I be observed, and what happens if there is bleeding?
• Which tests does the pathology include, and when will I get the report?
• Can my own nephrologist at home receive the report and slides?

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Hospitals with Urology in Turkey

Academic Hospital

Üsküdar, Istanbul

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Lokman Hekim Istanbul Hospital

Pendik, Istanbul

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