Post TRUS Prostate Biopsy: Complications & Patient Instructions

Q: Is it normal to see blood in urine, semen, or stool after prostate biopsy?

Yes. Blood in urine 66%, semen 38%, stool 28% — all expected and resolve within 10 days. No treatment needed unless severe or prolonged beyond 10 days.

Q: What signs of infection should I watch for after prostate biopsy?

Fever >38°C, chills, worsening pain, difficulty urinating, or feeling unwell require immediate care. May indicate UTI (6%), sepsis (0.5%), or perineal infection. Seek emergency care for high fever or chills.

Q: Why is TRUS biopsy still performed if it carries infection risk?

TRUS biopsy remains the gold standard for confirming prostate cancer. Diagnostic benefit outweighs risk in properly selected patients. Modern alternatives include MRI-fusion transperineal biopsy which avoids the rectal route and greatly reduces infection risk.

最后更新： 2026年5月18日

Soarawee Weerasopone，泌尿科医生

曼谷医院总部，曼谷

Samitivej Sriracha 医院, 春武里府

LINE联络

TRUS (Transrectal Ultrasound-Guided) prostate biopsy was first introduced in 1989 and remains the gold standard for confirming prostate cancer diagnosis, with over 4 million procedures performed worldwide annually. This article covers the possible complications following TRUS prostate biopsy so patients are prepared and know when to seek urgent care.

曼谷医院泌尿外科中心泰国在线预订 02-310-3009 bhquro@bdms.co.th
春武里府斯里拉查（Samitivej Sriracha）医院 088-022-1445

TRUS-guided prostate biopsy is performed as a day-care procedure under ultrasound guidance.

Possible complications after TRUS prostate biopsy

Bleeding complications — typically resolve within 10 days post-procedure:
- Blood in urine (hematuria) — 66%
- Blood in ejaculation (hematospermia) — 38%
- Blood in stool (rectal bleeding) — 28%
Infectious complications:
- Urinary tract infection — 6%
- Fever — 4%
- Persistent painful urination — 3%
- Pain or burning on urination — 1%
- Serious bloodstream infection (sepsis) — 0.5%
- Serious perineal skin infection — 0.05%
Other complications:
- Vasovagal response (sweating, nausea, dizziness, fainting) — 7%
- Acute urinary retention — 0.3%
- Myocardial infarction — 0.3%

The urologist uses ultrasound guidance to target prostate tissue during the biopsy procedure.

The infection risk from TRUS biopsy relates to its transrectal approach — the ultrasound probe necessarily passes through the rectal canal, which is contaminated with bowel flora. Published data confirms that postoperative infection rates cannot be fully eliminated by any preoperative rectal preparation protocol, even with proper prophylactic antibiotics given before every procedure.

Prophylactic antibiotics must always be administered before TRUS biopsy to reduce infection risk.

Despite these complications, the benefits of TRUS biopsy in correctly confirming prostate cancer diagnosis outweigh the risks when appropriate patient selection is applied. Under specialist urological care, careful patient selection and pre-procedure preparation minimize risks. Informed counseling about potential complications reduces patient anxiety and helps patients recognize warning signs that require urgent medical attention.

Frequently Asked Questions About Post-TRUS Prostate Biopsy Care

Is it normal to see blood in urine, semen, or stool after prostate biopsy?

Yes. Bleeding complications are very common after TRUS prostate biopsy. Blood in urine (hematuria) occurs in up to 66% of patients, blood in ejaculation (hematospermia) in 38%, and rectal bleeding in 28%. These are expected side effects of the needle passes through the prostate and surrounding tissue. In the vast majority of cases, all bleeding resolves spontaneously within 10 days. No special treatment is required unless bleeding is severe or prolonged beyond this period.

What signs of infection should I watch for after prostate biopsy?

Fever above 38°C, shaking chills, worsening pain, difficulty urinating, or feeling generally unwell after TRUS biopsy are warning signs that require immediate medical attention. These may indicate urinary tract infection (6%), sepsis (0.5%), or perineal infection (0.05%). The infection risk is inherent to the transrectal approach — the probe passes through the rectum, which contains bowel bacteria. Prophylactic antibiotics are given before every TRUS biopsy to reduce this risk, but cannot eliminate it entirely. Seek emergency care if you develop high fever or chills after the procedure.

Why is TRUS biopsy still performed if it carries infection risk?

TRUS-guided biopsy remains the definitive method for confirming prostate cancer diagnosis. More than 4 million procedures are performed worldwide annually. The diagnostic benefit — definitively confirming or ruling out prostate cancer — outweighs the complication risk in appropriately selected patients. Modern advances include MRI-fusion-guided biopsy and transperineal biopsy (which avoids the rectal route entirely, significantly reducing infection risk). Dr. Soarawee Weerasopone offers the latest MRI-fusion transperineal approach at Bangkok Hospital Headquarters.

If you have concerns about prostate biopsy or have developed complications after the procedure, Dr. Soarawee Weerasopone offers specialist consultations at Bangkok Hospital Headquarters. 预约咨询.

**免责声明：** 本内容由曼谷医院总院的认证泌尿科医生 Soarawee Weerasopone 医生撰写和审阅。本内容仅用于教育目的，不构成医疗建议。在开始任何医疗治疗前，请务必咨询合格的医疗专业人士。.