Perineural invasion on prostate needle biopsy does not predict biochemical failure following brachytherapy for prostate cancer

Christopher J. Weight, Jay P. Ciezki, Chandana A. Reddy, Ming Zhou, Eric A. Klein

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

Purpose: To determine if the presence of perineural invasion (PNI) predicts biochemical recurrence in patients who underwent low-dose-rate brachytherapy for the treatment of localized prostate cancer. Methods and Materials: A retrospective case control matching study was performed. The records of 651 patients treated with brachytherapy between 1996 and 2003 were reviewed. Sixty-three of these patients developed biochemical failure. These sixty-three patients were then matched in a one-to-one ratio to patients without biochemical failure, controlling for biopsy Gleason score, clinical stage, initial prostate-specific antigen, age, and the use of androgen deprivation. The pathology of the entire cohort was then reviewed for evidence of perineural invasion on initial prostate biopsy specimens. The biochemical relapse free survival rates for these two groups were compared. Results: Cases and controls were well matched, and there were no significant differences between the two groups in age, Gleason grade, clinical stage, initial prostate-specific antigen, and the use of androgen deprivation. PNI was found in 19 (17%) patients. There was no significant difference in the rates of PNI between cases and controls, 19.6% and 14.3% respectively (p = 0.45). PNI did not correlate with biochemical relapse free survival (p = 0.40). Conclusion: Perineural invasion is not a significant predictor of biochemical recurrence in patients undergoing brachytherapy for prostate cancer.

Original languageEnglish (US)
Pages (from-to)347-350
Number of pages4
JournalInternational Journal of Radiation Oncology Biology Physics
Volume65
Issue number2
DOIs
StatePublished - Jun 1 2006

Keywords

  • Biochemical failure
  • Brachytherapy
  • Perineural invasion
  • Prostate Cancer

ASJC Scopus subject areas

  • Radiation
  • Oncology
  • Radiology Nuclear Medicine and imaging
  • Cancer Research

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