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Clinical trialNCT04294225CompletedPhase 2Interventional

Anastrozole and Letrozole After Surgery for the Treatment of Stage I-III Breast Cancer

SponsorMayo ClinicEnrollment161Anatomic Stage I Breast Cancer AJCC v8Anatomic Stage IA Breast Cancer AJCC v8Anatomic Stage IB Breast Cancer AJCC v8Anatomic Stage II Breast Cancer AJCC v8Anatomic Stage IIA Breast Cancer AJCC v8Anatomic Stage IIB Breast Cancer AJCC v8+16 more conditions
View the registry record on ClinicalTrials.gov

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.

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

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

United States
  • Mayo Clinic in Arizona

    Scottsdale, Arizona, United States

  • Mayo Clinic in Florida

    Jacksonville, Florida, United States

  • Mayo Clinic in Rochester

    Rochester, Minnesota, United States

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
28 Apr 2020
Primary completion
12 Dec 2022
Completion
12 Dec 2022
Last update posted
28 Jan 2025
Registered enrollment
161
Registry id
NCT04294225

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.