Cryosurgical ablation for prostate cancer: a current review

Area of Science:

• Urology
• Oncology
• Surgical Techniques

Background:

• Cryosurgery is an emerging treatment for localized prostate cancer.
• Radical prostatectomy is a current standard treatment with established long-term outcomes.
• Limited long-term efficacy data exists for cryosurgery in prostate cancer management.

Purpose of the Study:

• To evaluate the current efficacy of cryosurgery for prostate cancer.
• To compare cryosurgery outcomes with radical prostatectomy.
• To identify potential improvements in cryosurgical techniques.

Main Methods:

• Review of available cryosurgery efficacy data, focusing on positive biopsy rates at 3 months and 1 year.
• Comparison of cryosurgery recurrence rates with disease-free survival rates from radical prostatectomy series.
• Analysis of specific cryosurgical protocols, including androgen ablation and freeze cycles.

Main Results:

• Current 3-month and 1-year positive biopsy rates (10-20%) suggest lower efficacy than radical prostatectomy's 10-year disease-free survival (80-90%).
• The Crittendon Hospital group's protocol (3-4% positive biopsies at 1 year) shows promise.
• Data for clinical stage C disease appears promising, with 10-20% positive biopsy rates at 3 months.

Conclusions:

• Cryosurgery is not yet comparable to radical surgery for younger patients with organ-confined prostate cancer due to immature survival data.
• Refined techniques, like those from the Crittendon Hospital group, may improve cryosurgery outcomes.
• Cryosurgery may be a reasonable option if 1-year local recurrence rates remain below 30%.