S9917, Selenium in Preventing Cancer in Patients With Neoplasia of the Prostate

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Basic Trial Information

PhaseTypeStatusAgeSponsorProtocol IDs
Phase IIIPreventionCompleted40 and overNCI, OtherCDR0000069210
U10CA037429, S9917, CALGB-70004, NCI-P02-0203, SWOG-S9917, ECOG-SWOG-S9917, NCT00030901

Trial Description


RATIONALE: Chemoprevention therapy is the use of certain drugs to try to prevent the development of cancer. The use of selenium may be an effective way to prevent prostate cancer in patients who have neoplasia of the prostate.

PURPOSE: Randomized phase III trial to study the effectiveness of selenium in preventing prostate cancer in patients who have neoplasia of the prostate.

Further Study Information


  • Compare the effects of selenium versus placebo on the 3-year incidence rate of prostate cancer in patients with high-grade prostatic intraepithelial neoplasia.
  • Compare the toxicity of these regimens in these patients.
  • Compare the effects of these regimens on the rate of increase in prostate-specific antigen (PSA) in these patients.
  • Compare the effects of these regimens on prostatic cellular proliferation and apoptosis, degradation of basal cell integrity of prostatic ducts, and changes in nuclear chromatin patterns in these patients.

OUTLINE: This is a randomized, double-blind, placebo-controlled, multicenter study. Patients are stratified according to age (40-60 vs 61 and over), race (African American vs other), baseline PSA (less than 4 ng/mL vs 4-10 ng/mL), concurrent vitamin E supplementation (yes vs no), and cores obtained from initial biopsy (10 or more vs less than 10). Patients are randomized to 1 of 2 arms.

  • Arm I: Patients receive oral selenium once daily.
  • Arm II: Patients receive oral placebo once daily. Treatment in both arms continues for 3 years in the absence of progression to prostate cancer or unacceptable toxicity.

Patients are followed every 6 months for 2 years and then annually for 8 years.

PROJECTED ACCRUAL: A total of 465 patients will be randomized for this study.

Eligibility Criteria


  • Diagnosis of high-grade prostatic intraepithelial neoplasia with no evidence of cancer
  • Documented by a digital rectal exam and biopsy of the prostate with transrectal ultrasound guidance (required if fewer than 6 cores obtained in biopsy) meeting one of the following conditions:
  • Biopsy yielded fewer than 10 cores within the past 24 months OR yielded more than 10 cores 6-24 months before study
  • Biopsy yielded 10 or more cores within the past 6 months
  • PSA ≤ 10 ng/mL (≤ 5 ng/mL for patients who have received finasteride or other androgen suppressor within the past 2 months)
  • American Urological Association symptom score of less than 20



  • 40 and over

Performance status:

  • SWOG 0-1

Life expectancy:

  • Not specified


  • Not specified


  • Not specified


  • Not specified


  • No malignancy within the past 5 years except adequately treated basal cell or squamous cell skin cancer or adequately treated stage I or II cancer that is in complete remission


Biologic therapy

  • Not specified


  • Not specified

Endocrine therapy

  • See Disease Characteristics
  • No concurrent finasteride or any other androgen suppressor


  • Not specified


  • Not specified


  • At least 30 days since prior daily dietary supplements containing 50 micrograms or more of selenium
  • No concurrent daily dietary supplements containing more than 50 micrograms of selenium

Trial Contact Information

Trial Lead Organizations/Sponsors

Southwest Oncology Group

  • National Cancer Institute
  • Eastern Cooperative Oncology Group
  • Cancer and Leukemia Group B
James Marshall, Study Chair
David Jarrard, Study Chair
W. Robert Lee, Study Chair

Link to the current ClinicalTrials.gov record.
NLM Identifier NCT00030901
ClinicalTrials.gov processed this data on October 30, 2014

Note: Information about this trial is from the ClinicalTrials.gov database. The versions designated for health professionals and patients contain the same text. Minor changes may be made to the ClinicalTrials.gov record to standardize the names of study sponsors, sites, and contacts. Cancer.gov only lists sites that are recruiting patients for active trials, whereas ClinicalTrials.gov lists all sites for all trials. Questions and comments regarding the presented information should be directed to ClinicalTrials.gov.