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Salvage Cryoablation for Radiorecurrent Prostate Cancer: Initial Experience at a Regional Health Care System.

Seena Safavy1, Ramzi B Jabaji1, Sharon M Lu1

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Salvage cryoablation offers a 50% success rate for recurrent prostate cancer after radiation. A post-treatment PSA nadir of 0.5 ng/mL or less is the strongest predictor of long-term biochemical control.

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Area of Science:

  • Urology
  • Oncology
  • Radiation Oncology

Background:

  • Local recurrence of prostate cancer after radiotherapy presents a significant clinical challenge.
  • Salvage prostatectomy offers high oncologic control but is associated with considerable morbidity.

Purpose of the Study:

  • To identify factors associated with successful salvage cryoablation for prostate cancer with radiorecurrence.
  • To evaluate the efficacy of salvage cryoablation in treating localized prostate cancer recurrence post-radiation.

Main Methods:

  • Retrospective review of 75 patients undergoing salvage cryoablation for biopsy-proven local recurrence after radiotherapy.
  • Exclusion of patients with seminal vesicle invasion or metastases.
  • Assessment of biochemical progression-free survival using the Phoenix criteria.

Main Results:

  • The overall biochemical salvage rate was 50.7% at a median follow-up of 3.9 years.
  • Independent predictors of success included precryotherapy Gleason score (3+3 or 3+4), low prostate-specific antigen (PSA), low PSA density, longer time to PSA nadir post-radiotherapy, and low postcryotherapy PSA nadir.
  • A postcryotherapy PSA nadir ≤ 0.5 ng/mL was strongly associated with improved biochemical progression-free survival (79.7% at 3 years, 64.7% at 5 years).

Conclusions:

  • Salvage cryoablation achieves biochemical control in approximately 50% of patients with radiorecurrent prostate cancer at 5 years.
  • Post-treatment PSA nadir is the most significant predictor of biochemical progression-free survival in this patient cohort.
  • Cryoablation represents a viable salvage option for select patients with localized prostate cancer recurrence post-radiation therapy.