A Study to Test Inavolisib Treatments in Participants With Early-Stage, PIK3CA-Mutated Breast Cancer
A Phase II, Open-Label, Multicenter Study Evaluating the Safety and Efficacy of Neoadjuvant Treatment With Inavolisib Combinations in Patients With Untreated, Early-stage, PIK3CA-Mutated Breast Cancer
Hoffmann-La Roche
60 participants
Sep 9, 2025
INTERVENTIONAL
Conditions
Summary
This study will evaluate the safety and efficacy of inavolisib combination therapies in participants with untreated, PIK3CA-mutated, Stage II-III, estrogen receptor (ER)-positive, Human Epidermal Growth Factor Receptor 2 (HER2)-negative breast cancer (BC).
Eligibility
Inclusion Criteria7
- Histologically confirmed operable or inoperable invasive Stage II-III BC according to American Joint Committee on Cancer (AJCC) TNM staging classification
- Candidate for neoadjuvant treatment and considered appropriate for endocrine combination therapy
- Willingness to undergo breast surgery (mastectomy or breast-conserving surgery) after neoadjuvant treatment (unless inoperable)
- Documented ER-positive tumor in accordance with current American Society of Clinical Oncology (ASCO)/College of American Pathologists (CAP) guidelines
- Documented HER2-negative tumor in accordance with current ASCO/CAP guidelines
- Documented Ki-67 score \>=5% as per local assessment
- Confirmed PIK3CA mutation
Exclusion Criteria6
- Stage IV (metastatic) BC
- Inflammatory BC (cT4d)
- Bilateral invasive BC
- History of ductal carcinoma in situ or lobular carcinoma in situ if they have received any systemic therapy for treatment or radiation therapy to the ipsilateral breast
- Previous systemic or local treatment for the primary BC currently under investigation (including excisional biopsy or any other surgery of the primary tumor and/or axillary lymph nodes, including sentinel lymph node biopsy, radiotherapy, cytotoxic, and endocrine treatments)
- Type 2 diabetes requiring ongoing systemic treatment at the time of study entry; or any history of Type 1 diabetes
Interventions
Inavolisib will be administered as per the schedule specified in the arms
Ribociclib will be administered as per the schedule specified in the arms
Letrozole will be administered as per the schedule specified in the arms
Locations(25)
View Full Details on ClinicalTrials.gov
For the most up-to-date information, visit the official listing.
NCT07054190