[Role of local radiotherapy after prostatectomy]

Area of Science:

• Oncology
• Radiation Oncology
• Urology

Context:

• Biochemical relapse after prostatectomy is linked to factors like extra-capsular extension, seminal vesicle invasion, and positive surgical margins.
• Adjuvant radiotherapy post-prostatectomy shows potential in improving local control and survival rates.
• Current treatment strategies observe biochemical relapse in only 20-40% of cases with positive surgical margins, despite radiotherapy's low toxicity.

Purpose:

• To evaluate the efficacy of close Prostate Specific Antigen (PSA) monitoring and adjuvant radiotherapy in managing biochemical relapse post-prostatectomy.
• To determine optimal timing for intervention based on PSA kinetics and recurrence patterns.
• To assess the effectiveness of salvage radiotherapy for late biochemical recurrence.

Summary:

• Identified risk factors for biochemical relapse post-prostatectomy include extra-capsular extension, seminal vesicle invasion, and positive surgical margins.
• Adjuvant radiotherapy can enhance local control and survival, with a low risk of toxicity.
• A strategy of close PSA monitoring and adjuvant radiotherapy upon PSA rise above 0 ng/ml is proposed.
• Salvage radiotherapy is effective for late biochemical recurrence (PSA > 0.2 ng/ml, PSA doubling time > 6 months), considering patient factors.

Impact:

• This approach may optimize treatment decisions for prostate cancer recurrence.
• Improved patient outcomes through timely and personalized radiotherapy interventions.
• Potential reduction in long-term complications and enhancement of disease-free survival.