Prostate Biopsy

How the biopsy is done, what the pathology report tells us, and what's normal afterward.

Why a biopsy is needed

Imaging and blood tests can raise or lower suspicion, but only tissue can establish whether prostate cancer is present and — just as importantly — how aggressive it is. That grading drives every subsequent decision.

Increasingly, biopsy is preceded by an MRI. This lets us target suspicious areas rather than sampling blindly, improves detection of significant cancers, and in some men avoids biopsy altogether.

How it is performed

An ultrasound probe is placed in the rectum to image the prostate. Local anesthetic is injected around the prostate — this makes a substantial difference and is standard. A spring-loaded needle then takes a series of small cores, typically twelve, with additional targeted cores if MRI identified a suspicious area.

The biopsy may be done transrectally, through the rectal wall, or transperineally, through the skin between the scrotum and rectum. The transperineal approach carries a lower infection risk and better samples the front of the gland.

The procedure takes roughly fifteen minutes. Each needle makes a brief snapping sound and a quick pinch. Most men tolerate it well.

Preparation

Blood thinners usually need to be held beforehand — we will give you specific timing, and you should not stop them without instruction. Antibiotics are given to reduce infection risk, and an enema may be requested for a transrectal biopsy. Arrange a ride if you will be sedated.

What is normal afterward

Some blood in the urine for several days is expected. Blood in the semen is very common and can persist for several weeks, sometimes appearing rust-colored or dark brown — this is harmless and not a sign that anything went wrong, though it surprises men who were not warned. Light rectal bleeding for a day or two can occur after a transrectal biopsy.

Avoid heavy lifting and strenuous exercise for a few days. Drink plenty of fluids.

Understanding the results

Results generally take about a week. The report describes each core: whether cancer is present, the Gleason score and Grade Group, and how much of each core is involved. Benign findings, inflammation, or precancerous changes may also be reported.

A negative biopsy does not entirely exclude cancer, since sampling can miss disease. If suspicion remains high, we may repeat testing, obtain an MRI, or plan a repeat biopsy.