Letrozole After Tamoxifen in Treating Women With Breast Cancer
Summary
The registered summary isn't in our current data snapshot. Read it on the ClinicalTrials.gov record ↗. Why? →
Investigators
The overall officials registered on this study. Names that resolve to a findmyKOL profile link to it; the rest are shown as registered.
- Hyman B. Muss, MD
University of Vermont
Study Chair - James N. Ingle, MD
Mayo Clinic
Study Chair - Martine J. Piccart-Gebhart, MD, PhD
Jules Bordet Institute
Study Chair - Monica Castiglione-Gertsch, MD
Insel Gruppe AG, University Hospital Bern
Study Chair - Nicholas J. Robert, MD
Fairfax Northern Virginia Hematology Oncology, PC - Fairfax
Study Chair - Paul E. Goss, MD, PhD
Massachusetts General Hospital
Study Chair - Silvana Martino, DO
Saint John's Cancer Institute
Study Chair
A profile link is shown only when the registered name resolves to a person record with a confident, namesake-checked match; ambiguous names stay unlinked.
Sites
57 registered facilities, with the per-site recruitment status where the registry publishes one. ClinicalTrials.gov does not publish per-site enrollment counts.
- Lethbridge Cancer Centre
Lethbridge, Alberta, Canada
- Bcca - Cancer Centre for the Southern Interior
Kelowna, British Columbia, Canada
- Nrgh - Nanaimo Cancer Clinic
Nanaimo, British Columbia, Canada
- Penticton Regional Hospital
Penticton, British Columbia, Canada
- Bcca - Fraser Valley Cancer Centre
Surrey, British Columbia, Canada
- Bcca - Vancouver Cancer Centre
Vancouver, British Columbia, Canada
- Bcca - Vancouver Island Cancer Centre
Victoria, British Columbia, Canada
- Cancercare Manitoba
Winnipeg, Manitoba, Canada
- the Moncton Hospital
Moncton, New Brunswick, Canada
- the Vitalite Health Network - Dr. Leon Richard
Moncton, New Brunswick, Canada
- Atlantic Health Sciences Corporation
Saint John, New Brunswick, Canada
- Dr. H. Bliss Murphy Cancer Centre
St. John's, Newfoundland and Labrador, Canada
- Qeii Health Sciences Center
Halifax, Nova Scotia, Canada
- the Royal Victoria Hospital
Barrie, Ontario, Canada
- Regional Cancer Program of the Hopital Regional
Greater Sudbury, Ontario, Canada
- Juravinski Cancer Centre at Hamilton Health Sciences
Hamilton, Ontario, Canada
- Cancer Centre of Southeastern Ontario at Kingston
Kingston, Ontario, Canada
- London Regional Cancer Program
London, Ontario, Canada
- Markham Stouffville Hospital
Markham, Ontario, Canada
- Credit Valley Hospital
Mississauga, Ontario, Canada
- Stronach Regional Health Centre at Southlake
Newmarket, Ontario, Canada
- Lakeridge Health Oshawa
Oshawa, Ontario, Canada
- Ottawa Health Research Institute - General Division
Ottawa, Ontario, Canada
- Peterborough Regional Health Centre
Peterborough, Ontario, Canada
- Algoma District Cancer Program
Sault Ste. Marie, Ontario, Canada
- Niagara Health System
St. Catharines, Ontario, Canada
- Thunder Bay Regional Health Science Centre
Thunder Bay, Ontario, Canada
- Humber River Regional Hospital
Toronto, Ontario, Canada
- Mount Sinai Hospital
Toronto, Ontario, Canada
- North York General Hospital
Toronto, Ontario, Canada
- Odette Cancer Centre
Toronto, Ontario, Canada
- St. Joseph'S Health Centre
Toronto, Ontario, Canada
- St. Michael'S Hospital
Toronto, Ontario, Canada
- Toronto East General Hospital
Toronto, Ontario, Canada
- Trillium Health Centre - West Toronto
Toronto, Ontario, Canada
- Univ. Health Network-Princess Margaret Hospital
Toronto, Ontario, Canada
- Univ. Health Network-the Toronto General Hospital
Toronto, Ontario, Canada
- Windsor Regional Cancer Centre
Windsor, Ontario, Canada
- Pei Cancer Treatment Centre,queen Elizabeth Hospital
Charlottetown, Prince Edward Island, Canada
- Centre de Sante Et de Services Sociaux de Gatineau
Gatineau, Quebec, Canada
Site investigator names are published by ClinicalTrials.gov only while a study recruits, so completed studies list sites without them.
Drugs studied
No drug or biological interventions are in our data for this study — it may test a procedure, device or behavioral intervention, or the intervention list isn't in our current snapshot. See the registry record ↗. Why? →
Registration & key dates
Registry attributes as recorded on the ClinicalTrials.gov study record.
- Start
- 24 Aug 1998
- Primary completion
- 22 Aug 2003
- Completion
- 31 Oct 2003
- Last update posted
- 27 Mar 2026
- Registered enrollment
- 5,187
- Registry id
- NCT00003140
Source: ClinicalTrials.gov, via the CTTI AACT database, data as of 12 Jul 2026. Registry facts are shown as registered by the study sponsor; findmyKOL does not interpret them.