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Related Experiment Videos

Positive prostate biopsy laterality and implications for staging.

Mark K Buyyounouski1, Eric M Horwitz, Alexandra L Hanlon

  • 1Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, Pennsylvania 19111, USA.

Urology
|August 2, 2003
PubMed
Summary
This summary is machine-generated.

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Adding prostate biopsy laterality to staging does not improve outcomes. Unilateral positive biopsies in T2c stage prostate cancer patients were linked to worse freedom from biochemical failure (bNED).

Area of Science:

  • Oncology
  • Urology
  • Radiation Oncology

Background:

  • Prostate biopsy laterality (unilateral vs. bilateral positive) is part of clinical staging but rarely utilized.
  • Current staging systems do not fully incorporate biopsy findings.
  • Understanding the impact of biopsy laterality on treatment outcomes is crucial.

Purpose of the Study:

  • To evaluate the effect of including positive prostate biopsy laterality in palpation staging.
  • To determine the influence of biopsy laterality on freedom from biochemical failure (bNED) after radiotherapy.

Main Methods:

  • Analysis of 1038 patients with localized prostate cancer treated with radiotherapy alone (1989-1999).
  • Comparison of Kaplan-Meier bNED curves using log-rank test.
  • Multivariate analysis using Cox proportional hazards regression model.

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Main Results:

  • No significant difference in bNED based on biopsy laterality for palpation T stages T1c, T2a, T2b, or T3.
  • A statistically significant difference in 5-year bNED was observed in the T2c stage.
  • Patients with unilateral positive biopsies in T2c stage had worse outcomes (46% vs. 74% bNED).

Conclusions:

  • Incorporating positive biopsy laterality into clinical staging leads to stage migration without outcome changes.
  • Biopsy laterality status should not be used for clinical staging in prostate cancer.
  • Further research may be needed to clarify the prognostic value of biopsy laterality in specific subgroups.