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Core length in prostate biopsy: size matters
Can Öbek1, Tünkut Doğanca, Sinan Erdal
1Department of Urology, Cerrahpaşa School of Medicine, University of Istanbul, Istanbul, Turkey. canobek@yahoo.com
The Journal of Urology
|April 14, 2012
Summary
Longer prostate biopsy cores significantly improve cancer detection rates. A core length exceeding 11.9 mm is recommended as a quality assurance benchmark for prostate cancer diagnosis.
Area of Science:
- Urology
- Pathology
- Oncology
Background:
- Prostate biopsy's diagnostic yield is often limited.
- Increasing core number or length can enhance cancer detection.
- The impact of biopsy core length on detection rates is understudied.
Purpose of the Study:
- To evaluate the role of prostate biopsy core length in cancer detection.
- To determine a minimal acceptable core length for quality assurance.
Main Methods:
- Retrospective analysis of 245 patients undergoing transrectal ultrasound-guided initial prostate biopsy (12-18 cores).
- Standardized biopsy procedures and pathological evaluations.
- Statistical comparison of core lengths between cancer-positive and cancer-negative patients.
Main Results:
- Overall cancer detection rate was 30.2%.
- Mean core length was significantly greater in patients with cancer (12.3 mm vs 11.4 mm).
- Cores >11.9 mm showed a higher cancer detection rate (39% vs 23%) and were associated with increased detection (OR 2.57).
Conclusions:
- Prostate biopsy needle core length is a critical morphometric parameter influencing cancer detection.
- A core length greater than 11.9 mm is suggested as a quality assurance cutoff for transrectal prostate biopsies.
