Prostate cancer tests
This page tells you about tests for prostate cancer. There is information about
Prostate cancer tests
If you have symptoms that could be due to prostate cancer you usually begin by seeing your GP. They will examine you and ask about your general health. They will take a blood test to check the levels of a protein called prostate specific antigen (PSA) in your blood. They will also do an examination of the prostate gland via the back passage (a digital rectal examination). If these tests are not normal, your doctor will refer you to a specialist at the hospital.
At the hospital
The specialist will repeat the blood test and examination of the prostate gland. They will also usually ask you to have a scan using sound waves – a rectal ultrasound. The ultrasound probe goes into your back passage (rectum) to get a clear picture of the prostate gland. This is uncomfortable, but shouldn’t hurt.
You may have up to 12 tissue samples (biopsies) taken during the scan. Your specialist takes the samples by firing a very small needle into the prostate and then removing it. This is a little uncomfortable, and may be painful but it does not take long. Before the test, you will have antibiotics to help prevent infection and an injection of local anaesthetic to numb the area.
If your prostate biopsy does not find cancer cells but your doctor still thinks there may be a small prostate cancer present, they may suggest that you have an MRI scan or a different type of biopsy.
An MRI scan uses magnetism to build up a picture of the inside of the body. It can show abnormal areas in the prostate gland.
A template biopsy uses a template with holes approximately 5 mm apart. The doctor puts it over the area of skin behind the testicles (the perineum) and uses an ultrasound scanner to take between 30 to 50 biopsy samples from the prostate.
A targeted biopsy uses the information from your ultrasound scan and also the information from the MRI scan. The doctor can then accurately take biopsies from abnormal areas of the prostate gland.
You can view and print the quick guides for all the pages in the Diagnosing prostate cancer section.
If you have symptoms that could be due to prostate cancer you usually begin by seeing your GP. They will examine you and ask about your general health. Your doctor will also take a blood test to check the levels of a protein called prostate specific antigen (PSA) in your blood. They will also do an examination of the prostate gland.
PSA is a protein produced by both normal and cancerous prostate cells. A high level of PSA can be a sign of cancer. But your PSA level can also be raised in prostate conditions that are not cancer (are benign) or if you have an infection. To check for PSA (prostate specific antigen), your doctor takes a sample of your blood. Your doctor may want to rule out a urine infection before carrying out a test. If you've had a urine infection, you shouldn't have a PSA test for at least a month after your treatment finishes.
PSA is usually measured in nanograms per millilitre of blood (ng/ml). There is no one PSA reading that is considered normal. The reading varies from man to man and the normal level increases as you get older. But the following values are a rough guide
- 3 ng/ml or less is considered to be in the normal range for a man under 60 years old
- 4 ng/ml or less is normal for a man aged 60 to 69
- 5 ng/ml or less is normal if you are aged over 70.
A reading higher than these values but less than 10 ng/ml is usually due to a non cancerous (benign) enlargement of the prostate gland. A reading higher than 10 ng/ml may also be caused by benign prostate disease, but the higher the level of PSA, the more likely it is to be cancer. Sometimes a cancer may be diagnosed in a man with a PSA reading within the normal range. But usually, the higher the reading, the more likely it is to be cancer.
Some men have PSA levels in the hundreds (or even thousands) when they are diagnosed. The higher the level of PSA at diagnosis, the more likely the cancer is to spread quickly.
PSA blood tests are also used to monitor how well prostate cancer treatment works or to decide whether you need treatment. If your PSA is stable, it is a sign that a cancer is not growing or spreading. Successful treatment shrinks cancer and so the PSA level in the blood then falls.
Your doctor puts a gloved finger into your back passage (rectum) to feel your prostate gland and check for abnormal signs, such as a lumpy, hard prostate. Doctors call this test a digital rectal examination (DRE).
If your GP finds anything that could be due to a cancer they will refer you to hospital for more tests. The tests are used to diagnose prostate cancer or to find out whether it has spread. You won't need to have all of the tests. Your doctor will discuss the tests you'll have and will explain what they are for.
At the hospital your doctor will usually repeat the PSA blood test and the rectal examination of the prostate.
You may have a rectal ultrasound scan to examine the prostate gland. It is called a trans rectal ultrasound (TRUS). You will need to make sure you have had a bowel movement beforehand so that your rectum is empty when you go for your appointment.
Your doctor puts a small ultrasound device into your back passage. It produces sound waves to create a clear picture of the prostate gland. This test is uncomfortable, but shouldn't hurt. It does not take long.
If the doctor finds a lump or hardening of your prostate during your rectal examination or ultrasound, they may take a sample of cells (a biopsy) to examine under a microscope. The biopsy is most often done through your back passage (rectum) using the transrectal ultrasound scanner. It is then called a TRUS biopsy. But you can also have a biopsy taken through the skin behind your testicles (the perineum). Or you may have it while you are having a cystoscopy examination.
Having a needle biopsy
You have the biopsy in the outpatient department. When you arrive at the hospital, a nurse will meet you. The nurse will ask you some questions and make sure that you understand what will happen. You will have antibiotics to take to help stop infection developing after the biopsy. You can have antibiotics in 3 different ways
- As tablets or capsules
- By injection into a vein
- Directly into the rectum in a suppository.
Before you have the biopsy, the doctor will show you the ultrasound machine and the very fine needle used to take the tissue samples. The needle is attached to a firing mechanism and the doctor will show you this and demonstrate the noise it makes so you know what to expect. The doctor will explain the whole procedure before they start and you can ask any questions you need to.
The doctor will take a series of small tissue samples from the prostate. First, you lie down on your left side. Your specialist will inject local anaesthetic into your back passage (rectum), to numb the area and make the procedure as painless as possible. The doctor then puts the ultrasound probe into your rectum to examine your prostate. To get the samples of prostate tissue, the fine needle is pushed along the ultrasound probe and into the prostate gland. This is a little uncomfortable, and may be painful but does not take long. You will feel a slight jolt each time the needle is fired. This may happen up to 12 times, as the doctor takes the different tissue samples.
After the test, you have a rest and a drink. You can then go home. It is very important to drink a lot of fluids for the next 24 hours. Your prostate gland will bleed slightly. And there is a risk of urine infection. Drinking plenty of fluid flushes out the blood and helps to stop any infection from developing. You will see a small amount of blood in your urine, back passage and semen after the test. This may carry on for a few weeks, but is nothing to worry about. But you should contact your doctor if you think you are getting an infection.
You should phone your doctor immediately or go to the accident and emergency department if you have
- Shivering or shaking
- A high temperature
- A lot of difficulty passing urine
- A need to pass urine very often
- A lot of blood in your urine or bowel movement
You will need antibiotics straight away if you have a urine infection.
If your prostate biopsy does not find cancer cells but you have a high PSA level, it may mean that the biopsy missed the cancer cells. Your doctor may suggest that you wait a few months and then have an MRI scan.
An MRI scan uses magnetism to build up a picture of the inside of the body. It can show up abnormal areas in the prostate gland.
We have information about having an MRI scan.
If a prostate biopsy is negative but your doctor thinks there may be a small prostate cancer present, they may suggest that you have a trans perineal template biopsy or targeted biopsy. These procedures can sometimes find a prostate cancer that has been missed by other types of biopsy.
You have a template biopsy under local anaesthetic or general anaesthetic and may have a tube (catheter) into your bladder to drain urine. You have antibiotics beforehand.
To do the biopsy the doctor puts a template with holes approximately 5 mm apart over the area of skin behind the testicles (the perineum). Under transrectal ultrasound guidance the doctor puts a biopsy needle in through the different holes in the template, to take samples from particular areas of the prostate. They may take between 30 to 50 samples.
For a targeted biopsy your doctor uses information from your ultrasound scan and also the information from an MRI scan. This helps them to accurately take biopsies from abnormal areas of the prostate gland.
After a template biopsy or targeted biopsy
After the test, you have a rest and a drink. You can then go home. The possible problems after these tests are the same as after a needle biopsy. You need to drink plenty of fluids and let your doctor know straight away if you have signs of infection.
Waiting for test results or for further tests can be a very worrying time. You may have contact details for a specialist nurse and you can contact them for information if you need to. It may help to talk to a close friend or relative about how you feel. You can also contact the Cancer Research UK nurses on freephone 0808 800 4040. The lines are open from 9 to 5, from Monday to Friday.
Our prostate cancer reading list has information about books and leaflets about prostate cancer and its treatment.
If you want to find people to share experiences with online, you could use Cancer Chat, our online forum.
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