Clinical trialNCT00290745CompletedPhase 1/PHASE2Interventional

Tamoxifen or Letrozole in Treating Women With Ductal Carcinoma in Situ

SponsorUniversity of California, San FranciscoEnrollment79Breast Cancer

View the registry record on ClinicalTrials.gov

Summary

The lay summary the sponsor registered on ClinicalTrials.gov.

RATIONALE: Estrogen can cause the growth of breast cancer cells. Hormone therapy using tamoxifen or letrozole may fight breast cancer by blocking the use of estrogen by the tumor cells or by lowering the amount of estrogen the body makes. PURPOSE: This clinical trial is studying how well tamoxifen or letrozole work in treating women with ductal carcinoma in situ.

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Investigators

The overall officials registered on this study. Names that resolve to a FindMyKOL profile link to it; the rest are shown as registered.

E. Shelley Hwang, MD, MPH
University of California, San Francisco
Principal Investigator
clinicaltrials.gov ↗
Frederic M. Waldman, MD, PhD
University of California, San Francisco
Principal Investigator
clinicaltrials.gov ↗
Nola M. Hylton, PhD
University of California, San Francisco
Principal Investigator
clinicaltrials.gov ↗
Rita Mukhtar, MD
University of California, San Francisco
Principal Investigator
clinicaltrials.gov ↗

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

1 registered facility, with the per-site recruitment status where the registry publishes one. ClinicalTrials.gov does not publish per-site enrollment counts.

United States

University of California, San Francisco
San Francisco, California, United States

Site investigator names are published by ClinicalTrials.gov only while a study recruits, so completed studies list sites without them.

Drugs studied

The drug and biological interventions registered on this study, normalized to their RxNorm ingredient where possible.

LetrozoleTamoxifen

Linked drugs open the directory filtered to KOLs working with them.clinicaltrials.gov ↗

Registration & key dates

Registry attributes as recorded on the ClinicalTrials.gov study record.

Start: 19 Feb 2002
Primary completion: 31 Jul 2009
Completion: 30 Jun 2011
Last update posted: 4 Dec 2020
Registered enrollment: 79
Registry id: NCT00290745

clinicaltrials.gov ↗

Source: ClinicalTrials.gov, via the CTTI AACT database, data as of 4 Nov 2026. Registry facts are shown as registered by the study sponsor; FindMyKOL does not interpret them.