Geneva, Sept. 25 -- International Clinical Trials Registry received information related to the study (NCT07817212) titled 'ESR1Real World Assessment Prevalence Study' on Sept. 8.

Study Type: Interventional

Study Design: Allocation: N/A. Intervention model: Single Group Assignment. Primary purpose: Diagnostic. Masking: None (Open Label).

Primary Sponsor: Institut fuer Frauengesundheit

Condition: HR+/HER2- aBC Undergoing 1L Treatment With CDK4/6i (Palbociclib, Abemaciclib or Ribociclib) and AI (Anastrozole or Letrozole)

Intervention: Diagnostic Test: ESR1 testing

Recruitment Status: Not recruiting

Phase: N/A

Date of First Enrollment: October 1, 2026

Target Sample Size: 1550

Countries of Recruitment: Germany

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