ABCSG 61 / TEODOR : Neoadjuvant TrEatment Optimization Driven by Circulating Tumor DNA and endOcrine Responsiveness

NARecruitingINTERVENTIONAL
Enrollment

350

Participants

Timeline

Start Date

August 13, 2025

Primary Completion Date

June 30, 2028

Study Completion Date

June 30, 2033

Conditions
Early and Locally Advanced Breast Cancer
Interventions
DIAGNOSTIC_TEST

blood sample for Signatera (TM) test

ctDNA: Evaluation of ctDNA-status prior to treatment start (ctDNA not detected or ctDNA-positive) until the last of five follow-up visit

DIAGNOSTIC_TEST

biopsy for Ki-67 assessment

Ki67: Evaluation of Ki-67-value after 3 weeks of aromatase inhibitor

DIAGNOSTIC_TEST

FFPE tumor sample for Signatera (TM) test (archived)

Evaluation of ctDNA status prior to treatment start

Trial Locations (14)

1190

RECRUITING

Allg. Gynäkologie u. gyn. Onkologie/Senologie, Vienna

Unknown

ACTIVE_NOT_RECRUITING

Landesklinikum Baden BGZ; Abt. f. Allgemein- u. Viszeralchirurgie, Baden

ACTIVE_NOT_RECRUITING

Dornbirn BGZ; Frauenheilkunde u. Geburtshilfe, Dornbirn

NOT_YET_RECRUITING

Landeskrankenhaus Feldkirch Interne E, Feldkirch

ACTIVE_NOT_RECRUITING

MUG - LKH Graz Klin. Abt. f. Onkologie, Graz

ACTIVE_NOT_RECRUITING

MUG - Univ. Frauenklinik Graz, Gyn. Abteilung, Graz

RECRUITING

MUI - Univ. Klinik f. Frauenheilkunde Innsbruck Klin. Abteilung f. Gynäkologie u. Geburtshilfe, Innsbruck

ACTIVE_NOT_RECRUITING

TumorZentrum Kepler Universitätsklinikum Linz, Linz

NOT_YET_RECRUITING

LKH Salzburg - PMU, Univ.Klinik f. Innere Medizin III / SCRI CCCIT, Salzburg

ACTIVE_NOT_RECRUITING

Universitätsklinikum St. Pölten, Klin. Abteilung f. Innere Medizin 1, Sankt Pölten

ACTIVE_NOT_RECRUITING

KH BHB St. Veit/Glan Brustzentrum Kärnten, Sankt Veit an der Glan

ACTIVE_NOT_RECRUITING

Hanusch Krankenhaus, 3. Medizinische Abteilung, Vienna

ACTIVE_NOT_RECRUITING

Klinik Hietzing, Gyn. Abteilung; Karl Landsteiner Institut f. gyn. Onkologie u. Senologie, Vienna

NOT_YET_RECRUITING

Universitätsklinikum Wiener Neustadt, Abteilung für Innere Medizin, Hämatologie und int. Onkologie, Wiener Neustadt

Sponsors

Collaborators (1)

All Listed Sponsors
collaborator

Natera, Inc.

INDUSTRY

lead

Austrian Breast & Colorectal Cancer Study Group

NETWORK