Presentation on theme: "Surgical Treatment for Local Recurrence of Prostate Cancer After Radiotherapy How safe and effective is modern salvage radical prostatectomy? Karim Touijer,"— Presentation transcript:
Surgical Treatment for Local Recurrence of Prostate Cancer After Radiotherapy How safe and effective is modern salvage radical prostatectomy? Karim Touijer, MD., James A. Eastham, MD Peter T. Scardino, MD Memorial Sloan-Kettering Cancer Center New York
Shipley, JAMA 281:1598, 1999 A Multi-institutional Pooled Analysis of Radiation Therapy 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 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 radiotherapy in a patient with a rising PSA.
Management alternatives for local recurrence after radiotherapy Expectant management (delayed hormonal therapy) Androgen ablation (continuous or intermittent) Salvage radical prostatectomy Cystoprostatectomy with urinary diversion Cryotherapy Investigational techniques: hyperthermia (RITA, HIFU), gene therapy, photodynamic therapy.
Salvage Radical Prostatectomy 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 not widely accepted? High peri-operative morbidity Doubts about long term efficacy
Evaluation of candidates for salvage prostatectomy 1.Is the cancer potentially curable? 2.Is the patient appropriate? 3.Would the operation be safe?
Evaluation for salvage prostatectomy 1.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 years – Highly motivated, willing to accept risks of salvage surgery
Evaluation for salvage prostatectomy 3. Would the operation be safe?3. Would the operation be safe? – No 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 ( ) Median age at RP (range) 65.4 ( ) Median PSA at RP (range) 6.3 ( ) Median time from RT to RP (range), months 48.1 ( ) Pre-RP clinical stage: 1992 TNM T1c 27 T2a 12 T2b 29 T2c 23 T3a 9 Pre-RP biopsy Gleason sum Gleason Gleason 7 42 Gleason Radiation treatment effect 9
Follow 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.
P-value Mean Operative Time, hours Mean Estimated Blood Loss, mL Mean Length of Stay, days9.63.7< HOSPITALIZATION AND OPERATIVE DATA OF SALVAGE RP
RECOVERY OF CONTINENCE BY YEAR P =.33 5-yr Recovery % (49-84) % (26-64)
SEVERE URINARY CONTINENCE 23 patients required insertion of artificial urinary sphincter for severe incontinence Sphincter insertion rate did not improve over time (P=.92) Good outcome after sphincter placement, only one patient required revision procedure
RECOVERY OF POTENCY* Patients Evaluated66 Median age, years65.8 Potent preoperatively24 (36) NVB preservation Bilateral7 (11) Unilateral17 (25) Nerve grafts Bilateral8 (12) Unilateral10 (15) * Defined as erections satisfactory for intercourse +/- sildenafil 5-yr Recovery: 16% (4-28%)
At Risk RECOVERY OF ERECTIONS BY PREOPERATIVE POTENCY STATUS P <
RECOVERY OF POTENCY 5-Year Potency (95% CI) Overall (n=66)16% (4-28%) Bilateral (n=7) or Unilateral NVB (n= 17) Preservation 28% (2-54%) Potent Preoperatively (n=24)45% (16-75%) 5 of 7 patients (71%) who had bilateral nerve-sparing salvage RP are potent Nerve grafting (n=18) was not associated with recovery of potency
Progression Free Probability (PFP) after Salvage Radical Prostatectomy Follow-up, median 9-yrs (1-19) Median Time to PSA Failure after Surgery 6.1 Years 5-year PFP: 57% 10-year PFP: 38% 15-year-PFP: 29% None received adjuvant treatment before relapse
Long term cancer control: Standard versus salvage RP Standard RRP * Salvage RRP PFP:5-year10-year5-year10-year Organ Confined94.9%92.2%86.0% ECE76.3%71.4%61.6%41.0% SVI37.4% 47.6%32.6% LN +18.5%7.4%60.0%- N=1,000N=100 * Hull et al. J. Urol, 167: 528, 2002
Cox logistic-regression (multivariable) analysis risk of risk factors for PSA progression after salvage radical prostatectomy
Log-Rank Test: 1 vs. 2: p= vs. 3: p= vs. 3: p= 0.79 Progression by Preoperative PSA level 4 and 10 ng/mL N=32 N=30 N=26 3. PSA >10 ng/mL 1. PSA <4 ng/mL 2. PSA >4 & <10 ng/mL N=9 N=3 N=13 N=5 N=2 N=6
Cancer Specific Survival Median follow up from surgery 5 years (1 – 20)
Cancer Specific Survival after Salvage RP: Preoperative Serum PSA Cancer Specific Survival after Salvage RP: Preoperative Serum PSA
Lessons Learned Modern salvage radical prostatectomy is safe and major complications are much less common. Long-term progression-free probability, by pathologic stage, is comparable to standard RP. Continuing challenges: –High rate of incontinence, strictures –Long lag time between radiotherapy and salvage RP leads to high recurrence rate despite restricting surgical candidates to those with PSA <10 ng/mL.