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PROSTATE SPECIFIC ANTIGEN

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PSA Testing for the Pretreatment Staging and Posttreatment Management of Prostate Cancer: 2013 Revision of 2009 Best Practice Statement

Panel Members:
Peter Carroll, MD, Chair; Peter C. Albertsen, MD, Vice Chair; Kirsten Greene, MD, Facilitator; Richard J. Babaian, MD; H. Ballentine Carter, MD; Pater H. Gann, MD, ScD; Misop Han, MD; Deborah Ann Kuban, MD; A. Oliver Sartor, MD; Janet L. Stanford, MPH, PhD; Anthony Zietman, MD

Explanation of Revised Document

This revised document contains the content of the "Prostate-Specific Antigen Best Practice Statement: 2009 Update" deleting that which pertains to the detection of prostate cancer. An updated guideline, available on the auanet.org website, is the 2013 AUA document "Early Detection of Prostate Cancer: AUA Guideline." Statements related to the detection of prostate cancer have been deleted, such that this revised document addresses only the use of PSA testing for the pretreatment staging and posttreatment management of prostate cancer. No other major changes have been made.

Introduction

PSA is a glycoprotein produced primarily by the epithelial cells that line the acini and ducts of the prostate gland. PSA is concentrated in prostatic tissue, and serum PSA levels are normally very low. Disruption of the normal prostatic architecture, such as by prostatic disease, inflammation, or trauma, allows greater amounts of PSA to enter the general circulation. Elevated serum PSA level has become an important marker of many prostate diseases – including benign prostatic hyperplasia, prostatitis, and prostate cancer, the focus of this document. Prostatic intraepithelial neoplasia (PIN) does not appear to raise serum PSA levels.1,2

The Use of PSA Testing for Pretreatment Staging of Prostate Cancer

Routine radiographic staging, such as with bone scan, computed tomography (CT), or magnetic resonance imaging (MRI), or surgical staging with pelvic lymph node dissection is not necessary in all cases of newly diagnosed prostate cancer (Figure 1).3, 4 Clinical criteria can identify patients for whom such staging studies are appropriate.

Figure 1. Staging – Once Prostate Cancer is Diagnosed

Figure 2: Staging – Once Prostate Cancer is Diagnosed

1. Pretreatment serum PSA predicts the response of prostate cancer to local therapy.

Accurate pretreatment staging is crucial in prostate cancer management. Serum PSA levels correlate with the risk of extra-prostatic extension, seminal vesicle invasion, and lymph node involvement. Patients with serum PSA levels of less than 10.0 ng/mL are most likely to respond to local therapy.

Pretreatment serum PSA is an independent predictor of response to all forms of therapy. Nomograms incorporating pretreatment PSA are statistical models that use important variables to calculate the probability of clinical endpoints, and have been useful in predicting outcomes of prostate cancer treatment.5, 6

Pretreatment PSAV is an independent predictor of prostate cancer-specific and overall mortality following therapy. For example, men with localized prostate cancer and a pretreatment PSAV greater than 2.0 ng/mL/year may experience a significantly higher risk of cancer recurrence and prostate cancer-specific mortality following surgery or external beam radiotherapy.7,8

2. Routine use of a bone scan is not required for staging asymptomatic men with clinically localized prostate cancer when their PSA level is equal to or less than 20.0 ng/mL.

An analysis of 23 studies examining the utility of bone scan found metastases in 2.3% of men with PSA levels <10.0 ng/mL, 5.3% in men with PSA levels from 10.1 to 19.9 ng/mL, and 16.2% in men with PSA levels >20.0 ng/mL.9 The authors concluded that low-risk patients are unlikely to have disease identified by bone scan. Accordingly, bone scans are generally not necessary in patients with newly diagnosed prostate cancer who have a PSA <20.0 ng/mL unless the history or clinical examination suggests bony involvement. As metastatic disease is significantly more common in advanced local disease or in high-grade disease, and as some high-grade prostate cancers have lower PSA values, it is reasonable to consider bone scans at the time of diagnosis when the patient has Gleason 8 or greater disease, or stage =T3 prostate cancer, even if the PSA is <10.0 ng/mL.9, 10

3. Computed tomography or magnetic resonance imaging scans may be considered for the staging of men with high-risk clinically localized prostate cancer when the PSA is greater than 20.0 ng/mL or when locally advanced or when the Gleason score is greater than or equal to 8.

Although this guideline is commonly used by the experts in the field, supporting data are lacking. CT scan is not a useful staging procedure for the vast majority of patients with newly diagnosed prostate cancer for whom the estimated incidence of positive lymph nodes is approximately 5%.11-13 CT is rarely positive when the PSA is <20.0 ng/mL and is generally reserved for men whose risk of lymph node metastasis is =20% by Partin table estimation.14

Additionally, several studies have found a correlation between Gleason score and lymphadenopathy detected on imaging; 1.2% of patients with Gleason score =7 have detectable lymph node enlargement on CT scan, compared to 12.5% in men with Gleason score =8 .9 However, it should be noted that many men with Gleason scores of 8-10 on biopsy, may be downgraded based on examination of radical prostatectomy specimens.15 CT scan identification of pelvic adenopathy depends upon lymph node enlargement, and the correlation between nodal size and metastatic involvement is poor.16 Although the histologic incidence of positive pelvic lymph nodes is substantial when PSA levels exceed 25.0 ng/mL, the sensitivity of CT scanning for detecting positive nodes is only about 30% to 35%, even at these levels.12

For similar reasons, MRI scanning using a body coil is also not a useful staging procedure in the vast majority of patients with newly diagnosed prostate cancer, because sensitivity is again determined by lymph node size.17 Its sensitivity for detecting nodal metastases, as determined from the analysis of seven studies using MRI, was only 36%.13 Endorectal coil MRI together with magnetic resonance spectroscopy (MRS) for characterization of cancer stage and volume is still considered an investigational procedure, but has shown promise in preliminary studies.18, 19

MRS allows MRI technology to identify functional and metabolic abnormality.20 However, imaging modalities of various types are being refined and will likely play a greater role in the routine diagnosis, staging, treatment and post-treatment evaluation of prostate cancer in the future.21, 22

4. Pelvic lymph node dissection for clinically localized prostate cancer may not be necessary if the PSA is less than 10.0 ng/mL and the Gleason score is less than or equal to 6.

Although pelvic lymph node dissection is often routinely performed in conjunction with radical prostatectomy, its morbidity, even if limited, must be considered. This is especially true in cases where it offers little additional information. A benefit to standard lymph node dissection has not been conclusively shown.23 Several studies have shown increased sensitivity; in addition, that there may be a recurrence and survival benefit associated with extended lymph node dissection, especially in intermediate- to high-risk patients, even when all nodes are negative.23-26 In extended lymphadenectomy, the area of additional dissection involves the region from the external iliac vein to the internal iliac vein medially, and to the bifurcation of the common iliac artery superiorly, rather than to just the obturator fossa.27 The benefit accruing to this more extended dissection must be balanced against the potential for increased morbidity, however, making careful patient selection critical.28

Measurement of pretreatment PSA level, supplemented with clinical stage and Gleason score information, can identify a subset of patients in whom the incidence of nodal metastases is very low (3% to 5%). Patients with a pretreatment PSA level <10.0 ng/mL and a Gleason score =6 rarely have nodal metastases, and it may be appropriate to omit lymphadenectomy in this group. These observations have been made in several large series of patients. 29-33

The Use of PSA in the Post-treatment Management of Prostate Cancer

1. Periodic PSA determinations should be offered to detect disease recurrence. The early biochemical (PSA) detection of recurrence after definitive local therapy (Figure 2) may prompt further treatment. The optimal strategy for such adjunctive therapy, including time of initiation, remains uncertain, and it is the focus of ongoing clinical trials and study. Different definitions of biochemical recurrence exist after surgery and radiation, making it difficult to compare recurrence free survival by time period.34 To date, it is unknown whether survival is altered by using PSA values to time the initiation of salvage therapy.35, 36 Treatment options for recurrence following radical prostatectomy include surveillance, salvage radiation therapy, other forms of focal therapy, androgen deprivation and enrollment in clinical trials evaluating new therapies. Treatment options for recurrence after radiation therapy include surveillance, androgen deprivation, cryotherapy, additional radiation (i.e. brachytherapy), and salvage radical prostatectomy. Salvage therapies in both instances may be more effective if initiated early, but the overall impact of any form of salvage therapy is currently the subject of much study. 37, 38

Figure 2. Posttreatment Assessment and Management

Figure 3. Posttreatment Assessment and Management

2. Serum PSA should decrease and remain at undetectable levels after radical prostatectomy.

A detectable PSA following radical prostatectomy is associated with eventual clinical disease recurrence in some, but not all patients. It may also be due to the presence of benign glands.39

The AUA defines biochemical recurrence as an initial PSA value =0.2 ng/mL followed by a subsequent confirmatory PSA value =0.2 ng/mL.40 However, a cut-point of 0.4 ng/mL may better predict the risk of metastatic relapse.41 This cut-point was selected as a means of reporting outcomes, however, rather than as a threshold for initiation of treatment. The median interval from PSA recurrence to cancer death is between 5 and 12 years, depending upon the Gleason score and PSA doubling time. The utility of "ultrasensitive" PSA testing has not been established as yet. Although its use seems to distinguish between those who are less likely and those who are more likely to recur, there may be considerable variability and inconsistency of results at low PSA levels.42, 43

3. Serum PSA should fall to a low level following radiation therapy, high intensity focused ultrasound and cryotherapy and should not rise on successive occasions.

Following radiation therapy, the PSA value should fall to a low level and then remain stable. PSA values <0.2 are uncommon after external beam radiotherapy, which does not ablate all prostate tissue. A consistently rising PSA level usually, though not always, indicates cancer recurrence. The number of rises needed to define a failure has been a matter of debate, but a consensus is emerging in support of the American Society for Therapeutic Radiation and Oncology (ASTRO) definition of failure: three successive rises above nadir.44 More recently it has been recognized that this endpoint is relevant only for external beam radiotherapy and even then it is easily confounded by biological variability.

The change in PSA following interstitial prostate brachytherapy is complex. Over the first year, the PSA level declines, then rises again in the second or third year in up to 40% of cases, only to fall back to much lower values by year four.45-47 Although these rises (or "benign bounces") are generally small (<0.8 ng/mL), they can, on occasion, be as high as 10.0 ng/mL, and they may last for 6 to 18 months. Their cause is uncertain, but they may correspond to infarction of the prostate occurring as a late vascular effect of the radiation. The principal concern regarding the benign bounce is that it may be confused with failure and lead to the initiation of unnecessary additional therapy. Ironically, bounces may actually predict a particularly good ultimate outcome.48 By the fifth year after interstitial prostate brachytherapy, the PSA level is <0.6 ng/mL in 90% of patients who are clinically disease free. The median PSA level of these patients is <0.1 ng/mL.49

A Consensus Committee was convened in Phoenix in 2005 to reconcile these differences and to produce a universal definition of PSA failure after all forms of radiation therapy, with or without androgen deprivation. The Committee arrived at the following conclusions: that any rise in PSA level of 2.0 ng/mL or more, over and above the nadir, predicted true failure with great sensitivity and specificity after both external beam radiotherapy and interstitial prostate brachytherapy, irrespective of whether either of these treatments was accompanied by androgen deprivation. The Consensus Committee also determined that the time of failure should not be backdated to the first rise in PSA.50, 51 This endpoint, the "Phoenix Definition," was designed to make comparison between any radiation series possible but did not facilitate easy comparisons with surgical series.52, 53 It was designed as a research tool, rather than as a trigger for a clinical intervention. The Consensus Committee further noted that setting a "target PSA" was not possible after external beam radiotherapy, although for interstitial prostate brachytherapy a PSA level of <0.7 ng/mL at five years would be reasonable. They also commented that the PSA level continues to decline more than five years after interstitial prostate brachytherapy, allowing for even tighter definitions of failure with enough follow-up. Less data exist to document PSA behavior after either cryotherapy or high-intensity focused ultrasound.

4. PSA nadir after androgen suppression therapy predicts mortality

Though it has long been known that achievement of a low PSA nadir after hormonal therapy has prognostic significance,53, 54 there are now increasing data that quantitatively link this end point to survival. For patients with metastatic disease receiving androgen suppression therapy, failure to achieve a PSA nadir of <4.0 ng/mL seven months after initiation of therapy is associated with a very poor prognosis (median survival: approximately one year) whereas those patients with a PSA nadir of <0.2 ng/mL have a relatively good prognosis (median survival: over six years). For patients with PSA nadirs >0.2 and <4.0 ng/mL, the prognosis is intermediate (median survival of 44 months).55

Additional data to support the importance of PSA nadir following hormonal therapy are derived from studies of patients with nonmetastatic disease. For patients with a PSA rise following radical prostatectomy or radiation and no radiologic evidence of metastases, a PSA nadir of >0.2 ng/mL within eight months of androgen suppression is associated with a 20-fold greater risk of prostate cancer-specific mortality as compared to those patients with a PSA nadir of <0.2 ng/mL.56 A PSA nadir of >0.2 ng/mL in the setting of a PSADT of <3 months is an ominous finding. Taken together, these data clearly support the prognostic importance of the value of the PSA nadir after androgen deprivation therapy and suggest that careful PSA monitoring after the initiation of such therapy can effectively identify those patients with a poor prognosis.

For patients with hormone-refractory disease (defined as disease progression despite castrate levels of testosterone), the relationship between PSA decline and prognosis remains controversial. Despite multiple studies indicating that PSA declines of >50% correlate with survival,57-59 large well-controlled studies have shown mixed results.60-62 Attempts to establish PSA declines as a surrogate end-point for patients in this setting have not been universally accepted and more investigation is necessary to create consensus. However, PSA kinetics do appear to correlate with outcomes in this group of patients.63

5. Bone scans are indicated for the detection of metastases following initial treatment for localized disease but the PSA level that should prompt a bone scan is uncertain. Additional important prognostic information can be obtained by evaluation of PSA kinetics.

For patients with a rising PSA level after surgery or radiation for localized prostate cancer, the estimate of total PSA alone is an imperfect predictor of a positive bone scan. In studies where bone scans have been positive in this setting, PSA values have averaged between 30.0 and 140.0 ng/mL.64-67 For this reason, the lowest PSA value at which bone scans will always be positive is uncertain. Several analyses67,68 indicate that the rate of PSA change is an additional critical variable in this setting. For men with a PSA doubling time >6 months and a serum PSA <10.0 ng/mL, the probability of a positive scan is extremely low (less than 1%); however for patients with a PSADT of <6 months, there is approximately a 10% chance of a positive bone scan. Nomograms have been constructed which predict the likelihood of a positive bone scan using a combination of PSA kinetics and PSA values.68 Thus, the use of routine bone scans in the setting of a PSA rise following local therapy is not justified, particularly for those with a PSADT of >6 months and a PSA value of <10.0 ng/mL.

6. The kinetics of PSA rise after local therapy for prostate cancer can help distinguish between local and distant recurrence.

Distinguishing local from distant recurrence is problematic after local treatments as most patients with a PSA rise have a negative physical exam and noninformative imaging tests. A positive biopsy in the prostate (postradiation) or at the anastomotic site (postradical prostatectomy) may not be the only reason for the rise in PSA, as a distant recurrence may also be a contributing factor. Accordingly, other variables are necessary for assessment. Perhaps the best method to assess for local recurrence after radical prostatectomy is to review the prognostic variables associated with durable responses to salvage radiation therapy. Pooled data from multiple centers indicate several variables in the salvage radiation setting that are predictive of a durable response to salvage radiation.69 These variables include pathology findings at the time of surgery (seminal vesicle or margin positivity), PSA doubling time, PSA level at the beginning of radiation, and Gleason score. The PSA recurrence-free interval and the pre-operative PSA level are not thought to be consequential in predicting durable responses to radiation in this setting. Using these variables, one can risk-stratify patients into those more and less likely to respond to radiation. Of note, a positive post radical prostatectomy anastomotic biopsy does not independently predict positive responses to salvage radiation, thus calling into question the value of this procedure.70

Even patients with multiple adverse risk factors may respond to salvage radiation, especially those with positive surgical margins receiving treatment when the PSA is low (i.e. 0.5 to 1.5 ng/mL) and slowly rising.71 Given that salvage radiation is the only potentially curative treatment in this setting, such patients should strongly consider radiation.72 Whether or not radiation administered with concomitant androgen suppression is superior to radiation alone is an unsettled issue.

Predictors of favorable response to postradiation salvage prostatectomy are less well defined compared with those for salvage radiation following radical prostatectomy. Recurrent disease noted on prostate biopsy, PSA less than 10.0 ng/mL (preferably PSA less than 5.0 ng/mL), a clinically localized cancer (ie T1C or T2), and no evidence of metastases on prior evaluation or pre-operative imaging are reasonable criteria for consideration.73, 74

Excellent data now indicate that patients with a long PSADT (>15 months) have a low likelihood of prostate cancer-specific mortality over a 10 year period,75 and active surveillance may be considered for those with a life expectancy of <10 years. In contrast, patients with a PSADT <3 months have a median overall survival of 6 years following PSA failure, and are likely have distant disease.75, 76 In addition, patients experiencing a relapse after local therapy may be candidates for clinical trials.

Methods Used in Best Practice Statement Development

The AUA convened a multidisciplinary panel for the purpose of developing a resource about PSA testing for urologists and primary care physicians. Panel membership included six urologists, one radiation oncologist, two medical oncologists, one internist and one epidemiologist. Funding in support of panel activities was provided by the AUA. Panel members received no remuneration for their efforts, and each member provided conflict of interest disclosure.

The Panel formulated its policy statements and recommendations by consensus, based on a review of the literature and the Panel members' own expert opinions. The current policy was based on a reassessment of the previous policy published in 2000. After Panel members agreed on the general areas to be covered, each member took on the task of conceptualizing and writing and/or revising a section of the document in an area where he/she had specific expertise. Every part of the document was thoroughly critiqued by Panel members, both in written comments and in verbal discussions in a series of conference calls. Over the course of successive manuscript revisions, the Panel scrutinized and modified the conceptual framework, reworked the wording of key statements, and reexamined supporting evidence reported in the literature until Panel members reached consensus.

The Panel did not use any particular methodology to develop its consensus statements. As noted above, these statements are based upon Panel members' expert opinions and knowledge of the published literature, and are referenced with what the Panel considered to be the most appropriate publications. The Panel also did not address issues of costs or cost-effectiveness in this document, nor did it systematically incorporate patient values and preferences in the analysis. However, the Panel did include ample information in the document to assist patients as well as health care professionals in decision-making regarding the best use of serum PSA for prostate cancer early diagnosis, staging, and treatment follow-up of prostate cancer.

After the Panel reached an initial consensus, 70 peer reviewers representing the following medical specialties reviewed the manuscript: family practice, internal medicine, radiology, oncology and urology. The panel made numerous document changes based on insight from peer reviewers, Thereafter, the document was submitted for approval to the Practice Guidelines Committee of the AUA and then to the AUA Board of Directors for final approval.

The panel recognizes the limitations of the document and acknowledges that recommendations are likely to change with new information. However, it is hoped the information contained will assist physicians, other healthcare providers and patients in using serum PSA efficiently and responsibly.

References

1. Alexander, E.E., Qian, J., Wollan, P.C., et al: Prostatic intraepithelial neoplasia does not appear to raise serum prostate-specific antigen concentration. Urology, 47: 693, 1996

2. Ramos, C. G., Carvahal, G. F., Mager, D. E. et al: The effect of high grade prostatic intraepithelial neoplasia on serum total and percentage of free prostate specific antigen levels. J Urol, 162: 1587, 1999

3. Oesterling, J.E., Martin, S.K., Bergstralh, E.J., et al: The use of prostate-specific antigen in staging patients with newly diagnosed prostate cancer. JAMA, 269: 5760, 1993

4. Levran, Z., Gonzalez, J.A., Diokno, A.C., et al: Are pelvic computed tomography, bone scan, and pelvic lymphadenectomy necessary in the staging of prostatic cancer? Br J Urol, 75: 778, 1995

5. Kattan, M. W., Eastham, J. A., Stapleton, A. M. et al: A preoperative nomogram for disease recurrence following radical prostatectomy for prostate cancer. J Natl Cancer Inst, 90: 766, 1998

6. Cooperberg, M. R., Pasta, D. J., Elkin, E. P. et al: The University of California, San Francisco Cancer of the Prostate Risk Assessment score: a straightforward and reliable preoperative predictor of disease recurrence after radical prostatectomy. J Urol, 173: 1938, 2005

7. D'Amico, A. V., Renshaw, A. A., Sussman, B. et al: Pretreatment PSA Velocity and Risk of Death From Prostate Cancer Following External Beam Radiation Therapy. JAMA, 294: 440, 2005

8. D'Amico, A.V., Chen, M.H., Roehl, K.A., et al: Preoperative PSA velocity and the risk of death from prostate cancer after radical prostatectomy. N Engl J Med, 351: 125, 2004

9. Abuzallouf, S., Dayes, I., and Lukka, H.: Baseline staging of newly diagnosed prostate cancer: a summary of the literature. J Urol, 171: 2122, 2004

10. Murphy, G.P., Snow, P.B., Brandt, J., et al. Evaluation of prostate cancer patients receiving multiple staging tests, including ProstaScint scintiscans. Prostate. 42:145-9, 2000

11. Mohler, J., Lee, C.L., Bahnson, R. et al. NCCN Clinical Practice Guidelines in Oncology: Prostate Cancer. National Comprehensive Cancer Network, 2009

12. Flanigan, R.C., McKay, T.C., Olson, M., et al: Limited efficacy of preoperative computed tomographic scanning for the evaluation of lymph node metastasis in patients before radical prostatectomy. Urology, 48: 428, 1996

13. Wolf, J.S., Jr., Cher, M., Dall’Era, M., et al: The use and accuracy of cross-sectional imaging and fine-needle aspiration cytology for detection of pelvic lymph node metastases before radical prostatectomy. J Urol, 153: 993, 1995

14. Scardino, P.: Update: NCCN prostate cancer clinical practice guidelines. J Natl Compr Canc Netw, Suppl 1:S29-33, 2005

15. Donohue, J.F., Bianco, F.J. Jr., Kuroiwa, K., et al: Poorly differentiated prostate cancer treated with radical prostatectomy: long-term outcome and incidence of pathological downgrading. J Urol, 176: 991-5, 2006

16. Tiguert, R., Gheiler, E.L., Tefilli, M.V., et al: Lymph node size does not correlate with the presence of prostate cancer metastasis. Urology, 53: 367, 1999

17. Tempany C.M., Zhou X., Zerhouni E.A., et al: Staging of prostate cancer: Results of Radiology Diagnostic Oncology Group project comparison of three MR imaging techniques. Radiology 192: 47, 1994

18. Katz, S., Rosen, M. MR imaging and MR spectroscopy in prostate cancer management. Radiol Clin North Am. 44:723-34, 2006

19. D’Amico, A.V., Whittington, R., Malkowicz, S.B., et al: Role of percent positive biopsies and endorectal coil MRI in predicting prognosis in intermediate-risk prostate cancer patients. Cancer J Sci Am, 2: 343, 1996

20. Harisinghani, M.G., Barentsz, J., Hahn, P.F., et al: Noninvasive detection of clinically occult lymph-node metastases in prostate cancer. N Engl J Med, 348: 2491, 2003

21. Mazaheri, Y., Shukla-Dave, A., Muellner, A., Hricak, H.: MR imaging of the prostate in clinical practice. MAGMA, 2008

22. Hricak, H., Choyke, P.L., Eberhardt, S.C., Leibel, S.A., Scardino, P.T.: Imaging prostate cancer: a multidisciplinary perspective. Radiology, 243: 28, 2007

23. Joslyn, S.A. and Konety, B.R.: Impact of extent of lymphadenectomy on survival after radical prostatectomy for prostate cancer. Urology, 68: 121, 2006

24. Allaf, M.E., Palapattu, G.S., Trock, B.J. et al: Anatomical extent of lymph node dissection:impact on men with clinically localized prostate cancer. J Urol, 172: 1840, 2004

25. Bader, P., Burkhard, F.C., Markwalder, R., et al: Disease progression and survival of patients with positive lymph nodes after radical prostatectomy. Is there a chance of cure? J Urol, 169: 849, 2003

26. Masterson, T.A., Bianco, F.J., Jr., Vickers, A.J., et al: The association between total and positive lymph node counts, and disease progression in clinically localized prostate cancer. J Urol, 175: 1320, 2006

27. Burkhard, F.C., Schumacher, M., and Studer, U.E.: The role of lymphadenectomy in prostate cancer. Nat Clin Pract Urol, 2: 336, 2005

28. Clark, T., Parekh, D.J., Cookson, M.S., et al: Randomized prospective evaluation of extended versus limited lymph node dissection in patients with clinically localized prostate cancer. J Urol, 169: 145, 2003

29. Partin, A.W., Kattan, M.W., Subong, E.N.P., et al: Combination of prostate-specific antigen, clinical stage, and Gleason score to predict pathological stage of localized prostate cancer: A multi-institutional update. JAMA, 277: 1445, 1997

30. Bluestein, D.L., Bostwick, D.G., Bergstralh, E.J., et al: Eliminating the need for bilateral pelvic lymphadenectomy in select patients with prostate cancer. J Urol, 151: 1315, 1994

31. Narayan, P., Fournier, G., Gajendran, V., et al: Utility of preoperative serum prostate- specific antigen concentration and biopsy Gleason score in predicting risk of pelvic lymph node metastases in prostate cancer. Urology, 44: 519, 1994

32. Parra, R.O., Isorna, S., Perez, M.G., et al: Radical perineal prostatectomy without pelvic lymphadenectomy: Selection criteria and early resolution. J Urol, 155: 612, 1996

33. Bishoff, J.T., Reyes, A., Thompson, I.M., et al: Pelvic lymphadenectomy can be omitted in selected patients with carcinoma of the prostate: Development of a system of patient selection. Urology, 45: 270, 1995

34. Nielsen, M. E., Makarov, D. V., Humphreys, E. et al: Is it possible to compare PSA recurrence-free survival after surgery and radiotherapy using revised ASTRO criterion – "nadir + 2"? Urology, 72: 389, 2008

35. Moul, J. W., Wu, H., Sun, L. et al: Early versus delayed hormonal therapy for prostate specific antigen only recurrence of prostate cancer after radical prostatectomy. J Urol, 171: 1141, 2004

36. Freedland, S. J., Moul, J. W.: Prostate specific antigen recurrence after definitive therapy. J Urol, 177: 1985, 2007

37. Rogers, E., Ohori, M., Kassabian, V.S., et al: Salvage radical prostatectomy: Outcome measured by serum prostate specific antigen levels. J Urol, 153: 104, 1995

38. Ganswindt, U., Stenzl, A., Bamberg, M. et al: Adjuvant radiotherapy for patients with locally advanced prostate cancer – a new standard? Eur Urol, 54: 528, 2008

39. Furusato, B., Rosner, I.L.,, Osborn, D., et al. Do patients with low volume prostate cancer have prostate specific antigen recurrence following radical prostatectomy? J Clin Pathol. 61:1038-40, 2008

40. Cookson, M.S., Aus, G., Burnett, A.L., et al: Variation in the definition of biochemical recurrence in patients treated for localized prostate cancer: the American Urological Association prostate guidelines for localized prostate cancer update panel report and recommendations for a standard in the reporting of surgical outcomes. J Urol, 177: 540, 2007

41. Stephenson, A.J., Kattan, M.W., Eastham, J.A., et al: Defining biochemical recurrence of prostate cancer after radical prostatectomy: a proposal for a standardized definition. J Clin Oncol, 24: 3973, 2006

42. 222. Shen, S., Lepor, H., Yaffee, R., Taneja., S.S.: Ultrasensitive serum prostate specific antigen nadir accurately predicts the risk of early relapse after radical prostatectomy. J Urol, 173, 777-80, 2005

43.Taylor, J.A., Koff, S.G., Dauser, D.A., McLeod, D.G.The relationship of ultrasensitive measurements of prostate-specific antigen levels to prostate cancer recurrence after radical prostatectomy. BJU Int: 98: 540, 2006

44. American Society for Therapeutic Radiology Oncology Consensus Panel. Consensus Statement: Guidelines for PSA following radiation therapy. Int J Radiat Oncol Biol Phys, 37:1035-41, 1997

45. Critz, F.A., Williams, W.H., Benton, J.B., et al: Prostate specific antigen bounce after radioactive seed implantation followed by external beam radiation for prostate cancer. J Urol, 163: 1085, 2000

46. Merrick, G.S., Butler, W.M., Wallner, K.E., et al: Prostate-specific antigen spikes after permanent prostate brachytherapy. Brachytherapy, 2:181-88, 2003

47. Stock, R.G., Stone, N.N., and Cesaretti, J.A.: Prostate-specific antigen bounce after prostate seed implantation for localized prostate cancer: descriptions and implications. Int J Radiat Oncol Biol Phys, 56: 448, 2003

48. Patel, C., Elshaikh, M.A., Angermeier, K., et al PSA bounce predicts early success in patients with permanent iodine-125 prostate implant. Urology, 63: 110, 2004

49. Zelefsky, M., Kuban, D.A., Levy, L.B., et al: Multi-institutional analysis of long-term outcome for stages T1-T2 prostate cancer treated with permanent seed implantation. Int J Radiat Oncol Biol Phys., 2006 Nov 1; [Epub ahead of print]

50. Horwitz, E.M., Thames, H.D., Kuban, D.A., et al: Definitions of biochemical failure that best predict clinical failure in patients with prostate cancer treated with external beam radiation alone: a multi-institutional pooled analysis. J Urol, 173: 797, 2005

51. Kuban, D.A., Levy, L.B., Potters, L., et al: Comparison of biochemical failure definitions for permanent prostate brachytherapy. Int J Radiat Oncol Biol Phys., 653: 1487, 2006

52. Roach, M., Hanks, G.E., Thames H., et al: Defining biochemical failure following radiotherapy with or without hormonal therapy in men with clinically localized prostate cancer: recommendations of the RTOG-ASTRO Phoenix Consensus Conference. Int J Radiat Oncol Biol Phys, 65: 965, 2006

53. Matzkin, H., Eber, P., Todd, B., et al: Prognostic significance of changes in prostate- specific markers after endocrine treatment of stage D2 prostatic cancer. Cancer, 70: 2302, 1992

54. Miller, J.I., Ahmann, F.R., Drach, G.W., et al: The clinical usefulness of serum prostate specific antigen after hormonal therapy of metastatic prostate cancer. J Urol, 147: 956, 1992

55. Hussain, M., Tangen, C.M., Higano, C., et al: Absolute prostate-specific antigen value after androgen deprivation is a strong independent predictor of survival in new metastatic prostate cancer: data from Southwest Oncology Group Trial 9346 (INT-0162). J Clin Oncol, 24: 3984, 2006

56. Stewart, A.J., Scher, H.I., Chen, M.H., et al: Prostate-specific antigen nadir and cancer- specific mortality following hormonal therapy for prostate-specific antigen failure. J Clin Oncol, 23: 6556, 2005

57. Small, E.J., McMillan, A., Meyer, M., et al: Serum prostate-specific antigen decline as a marker of clinical outcome in hormone-refractory prostate cancer patients: association with progression-free survival, pain end points, and survival. J Clin Oncol, 19: 1304, 2001

58. Oudard, S., Banu, E., Beuzeboc, P., et al: Multicenter randomized phase II study of two schedules of docetaxel, estramustine, and prednisone versus mitoxantrone plus prednisone in patients with metastatic hormone-refractory prostate cancer. J Clin Oncol, 23: 3343, 2005

59. Sartor, O., Weinberger, M., Moore, A., et al: Effect of prednisone on prostate-specific antigen in patients with hormone-refractory prostate cancer. Urology, 52: 252, 1998

60. Tannock, I.F., de Wit, R., Berry, W.R., et al: Docetaxel plus prednisone or mitoxantrone plus prednisone for advanced prostate cancer. N Engl J Med, 351: 1502, 2004

61. Petrylak, D.P., Tangen, C.M., Hussain, M.H., et al: Docetaxel and estramustine compared with mitoxantrone and prednisone for advanced refractory prostate cancer. N Engl J Med, 351: 1513, 2004

62. Armstrong, A. J., Garrett-Mayer, E., Ou Yang, Y. C. et al: Prostate-specific antigen and pain surrogacy analysis in metastatic hormone-refractory prostate cancer. J Clin Oncol, 25: 3965, 2007

63. Robinson, D., Sandblom, G. Johansson, R., Garmo, H. Aus, G., Hedlund, P.O., Varenhorst, E: the Scandinavian Prostate Cancer Group. PSA kinetics provide improved prediction of survival in metastatic hormone-refractory prostate cancer. Urol, 2008

64. Gomez, P., Manoharan, M., Kim, S.S., et al: Radionuclide bone scintigraphy in patients with biochemical recurrence after radical prostatectomy: when is it indicated? BJU Int, 94: 299, 2004

65. Kane, C.J., Amling, C.L., Johnstone, P.A., et al: Limited value of bone scintigraphy and computed tomography in assessing biochemical failure after radical prostatectomy. Urology, 61: 607, 2003

66. Cher, M.L., Bianco, F.J., Jr., Lam, J.S., et al: Limited role of radionuclide bone scintigraphy in patients with prostate specific antigen elevations after radical prostatectomy. J Urol, 160: 1387, 1998

67. Okotie, O.T., Aronson, W.J., Wieder, J.A., et al: Predictors of metastatic disease in men with biochemical failure following radical prostatectomy. J Urol, 171: 2260, 2004

68. Dotan, Z.A., Bianco, F.J., Jr., Rabbani, F., et al: Pattern of prostate-specific antigen (PSA) failure dictates the probability of a positive bone scan in patients with an increasing PSA after radical prostatectomy. J Clin Oncol, 23: 1962, 2005

69. Stephenson, A.J., Scardino, P.T., Kattan, M.W., et al Predicting the outcome of salvage radiation therapy for recurrent prostate cancer after radical prostatectomy. J Clin Oncol,. 25:2035-41, 2007

70. Koppie, T.M., Grossfeld, G.D., Nudell, D.M., et al: Is anastomotic biopsy necessary before radiotherapy after radical prostatectomy? J Urol, 166: 111, 2001

71. Cheung, R., Kamat, A.M., de Crevoisier, R., et al: Outcome of salvage radiotherapy for biochemical failure after radical prostatectomy with or without hormonal therapy. Int J Radiat Oncol Biol Phys, 63:134-40, 2005

72. Trock, B. J., Han, M., Freedland, S. J. et al: Prostate cancer-specific survival following salvage radiotherapy vs observation in men with biochemical recurrence after radical prostatectomy. JAMA, 299: 2760, 2008

73. Bianco, F.J., Jr., Scardino, P.T., Stephenson, A.J., et al: Long-term oncologic results of salvage radical prostatectomy for locally recurrent prostate cancer after radiotherapy. Int J Radiat Oncol Biol Phys, 62: 448, 2005

74. Sanderson, K.M., Penson, D.F., Cai, J., et al: Salvage radical prostatectomy: quality of life outcomes and long-term oncological control of radiorecurrent prostate cancer. J Urol, 176: 2025, 2006

75. Freedland, S.J., Humphreys, E.B., Mangold, L.A., et al: Risk of prostate cancer-specific mortality following biochemical recurrence after radical prostatectomy. JAMA, 294: 433, 2005

76. D'Amico, A. V., Moul, J. W., Carroll, P. R. et al: Surrogate end point for prostate cancer- specific mortality after radical prostatectomy or radiation therapy. J Natl Cancer Inst, 95: 1376, 2003

Abbreviations and Acronyms

ASTRO American Society for Therapeutic Radiation and Oncology
AUA American Urological Association
BPH benign prostatic hyperplasia
cm centimeter
CT computed tomography
DRE Digital Rectal Examination
ERSPC European Randomized Study of Screening for Prostate Cancer
mg milligram
mL milliliter
MRI magnetic resonance imaging
MRS magnetic resonance spectroscopy
NCI National Cancer Institute
ng nanogram
PCPT The Prostate Cancer Prevention Trial
PIN Prostatic intraepithelial neoplasia
PSA Prostate-specific antigen
PSADT PSA doubling time
PSAV PSA velocity
TURP transurethral resection of the prostate
TZPSAD PSA density of the transition zone
US United States

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