What Is a Prostate Biopsy?

"Do I really need a biopsy?" It's the question most men ask when a prostate blood test comes back raised, or an examination feels different from usual. The honest answer is that blood tests and scans can raise a suspicion, but they can't settle it — only looking at actual prostate tissue under a microscope can do that. A prostate biopsy is how that tissue is obtained: a few tiny samples, taken with a fine hollow needle, sent to a laboratory, and examined by a pathologist. This page answers the questions men most often ask about it, one at a time. If you're also reading about the condition a biopsy is usually looking for, our cancer condition hub and our guide to prostate cancer give useful background.

Why would a doctor suggest one?

A biopsy is usually suggested when something has raised a question that other tests can't answer on their own. That might be a raised PSA blood test, a prostate that feels firm or uneven during an examination, or an MRI scan that shows an area the team wants to look at more closely. None of those findings, on its own, means cancer — an enlarged prostate, inflammation, and other non-cancerous changes can produce the same signals, which is exactly why tissue is needed. Our overview of an enlarged prostate (BPH) explains the most common non-cancerous reason the gland grows and tests change. A biopsy is, in other words, a sorting test: it separates the men who need treatment or closer follow-up from the larger group who don't.

What does the short video at the top show?

The brief clip at the top of this page, "Prostate Biopsy" (18 seconds), shows the core idea in miniature: small hollow needle-core samples being removed from the prostate gland so they can be examined microscopically for the presence of cancer — which is how its own description puts it. A second recording on this site, "Prostate Procedure" (about 51 seconds), walks through the same test in words, describing a thin needle taking small samples of prostate tissue to be looked at under a microscope, and naming the route through the back passage (a transrectal biopsy) among the approaches used. Neither clip is the whole appointment, of course — they're a useful preview of the sampling moment itself, which is usually the part men picture least clearly beforehand.

How are the samples actually taken?

In most cases the biopsy is guided by ultrasound. A small ultrasound probe gives the clinician a live picture of the prostate, so the needle can be aimed at the areas that need sampling rather than working blind. The needle itself is fine and spring-loaded: it clicks in and out quickly, taking a thin core of tissue each time, and several cores are usually taken from different parts of the gland so the laboratory gets a fair cross-section. There are two main routes for the needle — through the back passage, guided by the ultrasound probe there, or through the skin between the scrotum and the back passage, called a transperineal biopsy. Which route your team uses depends on their practice, your scan findings, and your own situation, and they'll tell you which one is planned. The area is numbed with local anaesthetic first in most services, and the appointment is usually a day-case one — you go home the same day.

What happens to the samples afterwards?

Each core is preserved, labelled, and sent to the pathology laboratory, where it's processed, sliced thinly, stained, and examined under a microscope — the same basic journey our general guide to a biopsy and how results are read describes for other parts of the body. The pathologist is looking at the pattern of the cells: whether the tissue is benign, inflamed, or shows cancerous change, and if cancer cells are present, how they are arranged. Results take time — the laboratory stages can't be rushed — and your team will tell you how and when to expect them, usually at a follow-up appointment or by letter and phone. A result that finds no cancer doesn't always end the story: if the original suspicion remains, the team may suggest monitoring, a repeat test, or further scans instead, and they'll explain why.

What should you expect in the days after?

It's common to see a small amount of blood — in the urine, in semen, or from the back passage — for a short time afterwards, and it usually settles on its own. You'll normally be told to drink plenty of fluids, take things a little easier for a day or two, and watch out for the things that do need prompt attention: difficulty passing urine, heavy or increasing bleeding, shivering or fever, or feeling generally unwell, any of which should be reported to the team or sought help for straight away, as they can be signs of infection or a blockage that needs treatment. You should also follow the specific instructions you were given about any medicines, including blood-thinning medicines and any preventive antibiotics — those instructions are individual, so this page deliberately doesn't generalise them. Most men, looking back, describe the anticipation as worse than the procedure itself: a short, undignified-feeling appointment that buys a definite answer, one way or the other.

References & further reading

MedlinePlus — Prostate Cancer: https://medlineplus.gov/prostatecancer.html

National Cancer Institute — Prostate Cancer, Patient Version: https://www.cancer.gov/types/prostate

NHS — Biopsy: https://www.nhs.uk/tests-and-treatments/biopsy/

National Cancer Institute — Tests and Procedures Used to Diagnose Cancer: https://www.cancer.gov/about-cancer/diagnosis-staging/diagnosis

Frequently Asked Questions

Does a prostate biopsy hurt?

Most men describe brief discomfort rather than strong pain. The area is usually numbed with local anaesthetic first, and each sample is taken with a quick spring-loaded click that lasts a fraction of a second. The ultrasound probe itself can feel awkward, and it's normal to feel tense — tell the team if you need a pause.

How long does a prostate biopsy take?

The sampling itself is usually over in a matter of minutes, although the whole appointment — changing, positioning, the ultrasound scan, the anaesthetic, and recovery checks — takes longer. It is normally a day-case procedure, so you go home the same day. Your appointment letter will give the timing for your own service.

What is the difference between a transrectal and a transperineal biopsy?

The names describe the needle's route. In a transrectal biopsy the needle passes through the wall of the back passage, guided by an ultrasound probe there. In a transperineal biopsy it passes through the skin between the scrotum and the back passage instead. Both aim to take the same kind of tissue cores; your team will explain which approach they plan and why.

Can a biopsy miss cancer?

A biopsy samples only part of the prostate, so it is possible — though not usual — for a small or awkwardly placed area of change to be missed, especially if the original blood test or scan remains concerning. That is why a clear result is sometimes followed by monitoring or a repeat test rather than simple discharge. Your team interprets the result together with your other findings, not in isolation.

When will I get my results?

The samples have to be processed and examined in the laboratory, which takes time — often one to two weeks, though services vary. You will usually be given a follow-up appointment, letter, or phone arrangement before you leave. If the date passes without contact, chase the team rather than assuming no news is good news.

MedicalVideos.com has published trusted medical videos since 2007. The site was founded by Dr. Mohamed Ibrahim, MD, PhD — physician-scientist.

Educational only — this article is general information about prostate biopsy, not medical advice and not a diagnosis. Whether a biopsy is needed, and what a result means, belong to the clinical team caring for the individual patient.