Surgical Treatment for Local Recurrence of Prostate Cancer After Radiotherapy How safe and effective is modern How safe and effective is modern salvage radical prostatectomy? salvage radical prostatectomy? Karim Touijer, MD., James A. Eastham, MD Peter T. Scardino, MD Memorial Sloan-Kettering Cancer Center New York
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Surgical Treatment for Local Recurrence of Prostate Cancer After Radiotherapy How safe and effective is modern salvage radical prostatectomy? Karim Touijer,
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Surgical Treatment for Local Recurrence of Prostate Cancer After Radiotherapy
How safe and effective is modern salvage How safe and effective is modern salvage radical prostatectomy?radical prostatectomy?
A Multi-institutional Pooled Analysis of Radiation Therapy A Multi-institutional Pooled Analysis of Radiation Therapy For Clinically Localized Prostate Cancer For Clinically Localized Prostate Cancer
Without Salvage Therapy
• Biochemical recurrence distant metastases
• Post-irradiation patients at high risk of metastases:
Rapid PSA doubling time
High grade tumors
3 Years
Rationale for Local Salvage TherapyRationale for Local Salvage Therapy
• Positive prostate biopsy 2 years or more after EBRT ~ 30% to 50%
• 32% after EBRT (78 Gy) Zelefsky et al IJROBP 41: 491, 1998 Pollack et al IJROBP 54: 677, 2002
• In case of rising PSA after EBRT with negative metastatic evaluation: 60% to 72% local persistence of disease on biopsy
Zelefsky et al IJROBP 41: 491, 1998 Zagars et al IJROBP 33: 23, 1995
Definition of Local Recurrence
Caution• Difficult to distinguish radiation induced atypia from residual cancer with severe radiation
changes. Gleason grading may be inaccurate unless there is abundant viable cancer.
• PSA “bounce,” a temporary rise in PSA within the first 2-3 years after radiotherapy, may occur in 10-15% of patients.
• With neoadjuvant androgen deprivation, PSA rise after cessation of hormonal therapy may occur before radiation-induced PSA nadir, resulting in a temporary rise in serum PSA.
Cancer in a needle biopsy >2 yr after radiotherapyCancer in a needle biopsy >2 yr after radiotherapyin a patient with a rising PSA.in a patient with a rising PSA.
Management alternatives for local Management alternatives for local recurrence after radiotherapyrecurrence after radiotherapy
• 10-year PSA progression free probability = 30% - 43%.
• 10-year cancer specific survival rates = 70% - 77%
• Fewer than 500 cases reported
Why is salvage radical prostatectomy Why is salvage radical prostatectomy not widely accepted?not widely accepted?
• High peri-operative morbidity
• Doubts about long term efficacy
Evaluation of candidates Evaluation of candidates for salvage prostatectomyfor salvage prostatectomy
1.1. Is the cancer potentially curable?Is the cancer potentially curable?
2.2. Is the patient appropriate?Is the patient appropriate?
3.3. Would the operation be safe?Would the operation be safe?
Evaluation for salvage prostatectomy
1.1. Is the cancer potentially curable?Is the cancer potentially curable?
• Initial cancer (before radiation) surgically curable: T1-3a N0 M0
• Current cancer T1-3a, PSA < 10, no evidence of metastases: bone scan, CT or MRI of abdomen and pelvic LN, Prostascint monoclonal antibody or PET scan
Evaluation for salvage prostatectomy
• 2. Is the patient appropriate?2. Is the patient appropriate?
– Good health, life expectancy >10 yearsGood health, life expectancy >10 years
– Highly motivated, willing to accept risks of salvage Highly motivated, willing to accept risks of salvage surgerysurgery
Evaluation for salvage prostatectomy
• 3. Would the operation be safe?3. Would the operation be safe?
– No evidence of radiation cystitis or proctitisNo evidence of radiation cystitis or proctitis
Salvage RP in 100 consecutive patients
• Between 1984 and 2003, 100 consecutive patients underwent salvage RP with curative intent for biopsy-confirmed, locally recurrent prostate cancer after external-beam radiotherapy or brachytherapy.
• Disease progression after salvage RP was defined as a PSA level of 0.2 or greater or by the initiation of androgen-deprivation therapy (ADT).
• Cancer mortality was attributed to patients with active clinical disease progression despite castration at time of death.
• Cox logistic regression analysis evaluated pre- and postoperative predictors of these endpoints.
Clinical Parameters in 100 Consecutive Patients (1985-2003)
Median age at RP (range) 65.4 (44 - 75)
Median PSA at RP (range) 6.3 (0.2 - 84)
Median time from RT to RP (range), months 48.1 (5 - 155)
Pre-RP clinical stage: 1992 TNM
T1c 27
T2a 12
T2b 29
T2c 23
T3a 9
Pre-RP biopsy Gleason sum
Gleason 2-6 33
Gleason 7 42
Gleason 8-10 16
Radiation treatment effect 9
Follow upFollow up
• The median follow-up after radiotherapy and salvage RP was 10 years (range, 3 to 24 years) and 5 years (range, 1 to 20 years), respectively
• The median time between radiation and surgery was 4 years
• 41 patients had preoperative PSA levels > 10 ng/mL, but the proportion of these patients has decreased significantly since 1993 (56% vs 13%, P=.001)
• The median preoperative PSA doubling time was 13 months and 22 patients had a PSADT of 6 months or less.
1984-92 1993-03 P-value
Mean Operative Time, hours 4.4 3.7 0.001
Mean Estimated Blood Loss, mL 910 1035 0.19
Mean Length of Stay, days 9.6 3.7 < 0.0001
HOSPITALIZATION AND OPERATIVE DATA OF HOSPITALIZATION AND OPERATIVE DATA OF SALVAGE RPSALVAGE RP
None received adjuvant treatment before relapseNone received adjuvant treatment before relapse
Pathologic Outcomes after Salvage RP
Overall
N=100
1984-94
N=48
1995-2003
N=52 P-value
Organ-confined 32% 17% 46% 0.002
Extraprostatic extension
45% 67% 25% 0.005
Seminal vesicle invasion
38% 50% 27% 0.03
Positive surgical margin
29% 31% 8% 0.004
Positive lymph nodes
9% 4% 14% 0.02
Long term cancer control:Standard versus salvage RP
Standard RRP* Salvage RRP
PFP: 5-year 10-year 5-year 10-year
Organ Confined 94.9% 92.2% 86.0% 86.0%
ECE 76.3% 71.4% 61.6% 41.0%
SVI 37.4% 37.4% 47.6% 32.6%
LN + 18.5% 7.4% 60.0% -
N=1,000 N=100
**Hull et al. Hull et al. J. UrolJ. Urol, 167: 528, 2002, 167: 528, 2002
Cox logistic-regression (multivariable) analysis risk of Cox logistic-regression (multivariable) analysis risk of risk factors for PSA progression after salvage radical risk factors for PSA progression after salvage radical
prostatectomyprostatectomy
Risk Factor PSA Progression HR (95% CI)p value
Serum PSA 0.01 4 to 10 vs. < 4 ng/ml 0.02 3.25 (1.2 -8.9) 10 vs. < 4 ng/ml 0.01 5.79 (2.1-15.4) Organ Confined 0.84 Extracapsular Extention 0.73 Seminal Vesicle Invasion 0.01 3.31 (1.3-8.0) Lymph Node Metastasis 0.04 2.39 (1.0-5.9)