About this procedure
Transrectal prostate ultrasound (TRUS) uses a protected ultrasound probe placed gently into the rectum to examine the prostate and nearby structures in more detail.
What the examination or consultation can show
A urologist may request TRUS when evaluating prostate size, structural changes, troublesome urination or findings from earlier tests. TRUS is an imaging examination and is not automatically a prostate biopsy.
When an assessment may help
Assessment may be considered for a weak urinary stream, problems emptying the bladder, a known prostate abnormality or a question raised by another examination. Symptoms alone do not establish the cause, and enlargement does not by itself prove cancer.
Important limitations and differences
An abdominal prostate scan and TRUS use different approaches with different imaging detail. Neither ultrasound method can independently confirm or rule out prostate cancer; PSA, clinical examination, MRI or a separate biopsy may be considered when indicated.
Preparation and procedure
The patient usually lies on one side. The clinician covers the probe, applies gel and gently inserts it into the rectum to obtain images. Tell the team beforehand about rectal pain, bleeding, recent surgery, allergies or other conditions. Preparation varies; avoid self-administered enemas or medicine changes unless instructed.
Next steps and follow-up
TRUS does not treat prostate disease. The report helps the urologist decide whether observation, medication, additional imaging or specific tests are appropriate. Results should always be interpreted alongside symptoms and history.
When to seek urgent care
Acute inability to urinate, high fever with severe pelvic pain or chills, or substantial bleeding needs urgent evaluation rather than a scheduled TRUS. Call 103 when emergency symptoms are present.
Related health information
Prostatitis; Erectile dysfunction; Kidney and bladder ultrasound.
Signs and symptoms
Diagnosis and tests
Care and treatment approaches
When to seek urgent care
Frequently asked questions
How does TRUS differ from an abdominal prostate ultrasound?
The transrectal probe is closer to the prostate and provides different detail. The appropriate method depends on the clinical question.
Is TRUS the same as a biopsy?
No. Standard TRUS produces ultrasound images. Biopsy is a separate procedure with its own risks and indications.
Can TRUS replace a urologist consultation?
No. A clinician must combine the report with symptoms, examination, laboratory results and other findings.
Important information
A medical consultation is needed for diagnosis and treatment recommendations.
Self-treatment can be harmful to your health.
