Trial Profile

Phase II Study of CDK 4/6 Inhibitor, LEE011 (Ribociclib), in Combination With Adjuvant Endocrine Therapy at Varying Duration for ER-positive Breast Cancer (LEADER)

Status: Active, no longer recruiting

Phase of Trial: Phase II

Latest Information Update: 14 Jan 2026

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At a glance

Drugs Ribociclib (Primary) ; Aromatase inhibitors
Indications Advanced breast cancer; Early breast cancer; HER2 negative breast cancer
Focus Therapeutic Use
Acronyms LEADER

Most Recent Events

22 Dec 2025 Planned primary completion date changed from 1 Oct 2025 to 1 Apr 2026.
08 Aug 2025 Planned primary completion date changed from 1 Oct 2024 to 1 Oct 2025.
08 Aug 2025 Status changed from recruiting to active, no longer recruiting.

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