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Estrogen Replacement Therapy in Treating Women With Early-Stage Endometrial Cancer

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT00002976
Recruitment Status : Terminated
First Posted : January 27, 2003
Last Update Posted : April 11, 2013
National Cancer Institute (NCI)
Eastern Cooperative Oncology Group
Southwest Oncology Group
Information provided by:
GOG Foundation

Brief Summary:

RATIONALE: Estrogen replacement therapy may improve quality-of-life in postmenopausal women with endometrial cancer. It is not yet known whether estrogen replacement therapy will affect cancer recurrence.

PURPOSE: Randomized double-blinded phase III trial to determine the effectiveness of estrogen replacement therapy in treating women who have stage I or stage II endometrial cancer.

Condition or disease Intervention/treatment Phase
Endometrial Cancer Drug: conjugated estrogens Phase 3

Detailed Description:


  • Determine the effect of estrogen replacement therapy on recurrence free and overall survival in women with a history of stage I or II endometrial adenocarcinoma.

OUTLINE: This is a randomized, double blind study. Patients are stratified according to stage of endometrial cancer (IA vs IB/IC vs II). Patients are randomized to one of two treatment arms:

  • Arm I: Patients receive oral conjugated estrogens (Premarin) daily for 3 years.
  • Arm II: Patients receive oral placebo daily for 3 years. Patients are followed every 6 months for 3 years and then annually for 2 years.

PROJECTED ACCRUAL: Approximately 2,108 patients will be accrued for this study.

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 2108 participants
Allocation: Randomized
Primary Purpose: Treatment
Official Title: A Randomized Double-Blinded Trial of Estrogen Replacement Therapy Versus Placebo in Women With Stage I or II Endometrial Adenocarcinoma
Study Start Date : June 1997
Actual Primary Completion Date : July 2006

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Information from the National Library of Medicine

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Ages Eligible for Study:   Child, Adult, Older Adult
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   No


  • Histologically confirmed grade I, II or III endometrial adenocarcinoma (endometrioid, villoglandular, mucinous, adenosquamous, papillary serous, clear cell, or not otherwise specified)
  • Must have had total hysterectomy and bilateral salpingo-oophorectomy within past 20 weeks

    • Surgical stage IA, IB, IC, IIA (occult), or IIB (occult) disease
  • Must have had normal mammogram, or a negative breast biopsy after an abnormal mammogram, within past year



  • Not specified

Performance status:

  • Not specified

Life expectancy:

  • Not specified


  • Not specified


  • Bilirubin no greater than 1.5 times normal
  • SGOT no greater than 3 times normal
  • No acute liver disease


  • Not specified


  • No prior thromboembolic disease


  • No prior or current carcinoma of the breast
  • No other prior invasive malignancy within the past 5 years except nonmelanoma skin cancer


Biologic therapy:

  • Not specified


  • Not specified

Endocrine therapy:

  • No concurrent hormonal therapy


  • Not specified


  • See Disease Characteristics
  • Recovered from prior surgery


  • No prior cancer treatment that would preclude study therapy
  • Concurrent participation on GOG Lap-1 or GOG Lap-2 allowed

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00002976

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Sponsors and Collaborators
Gynecologic Oncology Group
National Cancer Institute (NCI)
Eastern Cooperative Oncology Group
Southwest Oncology Group
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Study Chair: Richard R. Barakat, MD Memorial Sloan Kettering Cancer Center
Study Chair: Scott Wadler, MD Albert Einstein College of Medicine
Study Chair: David S. Alberts, MD University of Arizona
Publications of Results:
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ClinicalTrials.gov Identifier: NCT00002976    
Other Study ID Numbers: CDR0000065498
First Posted: January 27, 2003    Key Record Dates
Last Update Posted: April 11, 2013
Last Verified: April 2003
Keywords provided by GOG Foundation:
stage I endometrial carcinoma
stage II endometrial carcinoma
endometrial adenocarcinoma
Additional relevant MeSH terms:
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Endometrial Neoplasms
Uterine Neoplasms
Genital Neoplasms, Female
Urogenital Neoplasms
Neoplasms by Site
Uterine Diseases
Estrogens, Conjugated (USP)
Hormones, Hormone Substitutes, and Hormone Antagonists
Physiological Effects of Drugs