Alternate Title
Basic Trial Information
Objectives
Entry Criteria
Expected Enrollment
Outcomes
Outline
Related Publications
Trial Contact Information
Registry Information

Alternate Title

Tamoxifen in Treating Women With Breast Cancer

Basic Trial Information

Phase	Type	Status	Age	Sponsor	Protocol IDs
Phase III	Treatment	Closed	Not specified	Other	CRC-TU-ATTOM EU-98042, ISRCTN17222211, NCT00003678

Objectives

1. Compare the disease-free and overall survival of women with early breast cancer who are randomized to discontinue adjuvant tamoxifen vs those randomized to continue for at least 5 additional years.

Entry Criteria

Disease Characteristics:

• Histologically confirmed breast carcinoma that has been completely excised
  • Clinically relapse free



• Must have completed at least two years of adjuvant therapy with tamoxifen for early breast cancer AND have no clear indication for or against receiving further tamoxifen



• No significant endometrial hyperplasia



• No patients with negligibly low risk of breast cancer death



• Hormone receptor status:
  • Any status allowed

Prior/Concurrent Therapy:

Biologic therapy:

• Not specified

Chemotherapy:

• Not specified

Endocrine therapy:

• See Disease Characteristics

Radiotherapy:

• Not specified

Surgery:

• See Disease Characteristics

Other:

• Any primary treatment allowed

Patient Characteristics:

Age:

• Not specified

Sex:

• Female

Menopausal status:

• Any status allowed

Performance status:

• Not specified

Life expectancy:

• Not specified

Hematopoietic:

• Not specified

Hepatic:

• Not specified

Renal:

• Not specified

Other:

• No other life threatening disease
• No retinopathy
• No psychiatric disorder or other condition that would preclude study compliance
• No serious toxicity (e.g., depression) thought to be due to tamoxifen
• Not pregnant or nursing
• Fertile patients must use effective contraception

Expected Enrollment

A total of 8,000-20,000 patients will be accrued for this study.

Outcomes

All-cause mortality

Disease recurrence
Death due to breast cancer, other primary tumors, or cardiovascular causes

Outline

This is a randomized study. Patients are stratified for analysis according to duration of tamoxifen given before randomization (2-3 years vs 4-5 years vs 6-7 years vs 8-9 years vs 10 years and over), age (less than 49 vs over 50), and important prognostic factors, including tumor type and grade and nodal and estrogen receptor status. Patients are randomized to 1 of 2 treatment arms.

• Arm I: Patients discontinue tamoxifen after at least 2 years of prior treatment.



• Arm II: Patients continue treatment with tamoxifen for at least 5 additional years in the absence of unacceptable toxicity or disease progression.

Patients are followed annually.

Peer Reviewed and Funded or Endorsed by Cancer Research UK

Gray R, Davies C, Perry P: Tamoxifen for early breast cancer: better late than never. Ann Oncol 11 (5): 505-7, 2000.[PUBMED Abstract]

Rea D, Poole C, Gray R: Adjuvant tamoxifen: how long before we know how long? BMJ 316 (7143): 1518-9, 1998.[PUBMED Abstract]

Earl H, Gray R, Kerr D, et al.: The optimal duration of adjuvant tamoxifen treatment for breast cancer remains uncertain: randomize into aTTom. Clin Oncol (R Coll Radiol) 9 (3): 141-3, 1997.[PUBMED Abstract]

Earl H, Baker P, Kerr D, et al.: Adjuvant treatment with tamoxifen. Recruitment into studies assessing optimum duration of treatment must continue. BMJ 312 (7037): 1036-7, 1996.[PUBMED Abstract]

Gray R: Tamoxifen: how boldly to go where no women have gone before. J Natl Cancer Inst 85 (17): 1358-60, 1993.[PUBMED Abstract]

Trial Contact Information

Trial Lead Organizations

Queen Elizabeth Hospital at University Hospital of Birmingham NHS Trust

Daniel Rea, MD, Protocol chair		Ph: 44-121-472-1311

Registry Information
Official Title		A Large, Uniquely Simple, Randomised Study to Assess Much More Reliably the Balance of Benefits and Risks of Prolonging Adjuvant Tamoxifen Treatment in Early Breast Cancer
Trial Start Date		1991-05-01
Registered in ClinicalTrials.gov		NCT00003678
Date Submitted to PDQ		1998-11-18
Information Last Verified		2007-03-26