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A randomized, open-label, phase II trial comparing neoadjuvant endocrine therapy in combination with trastuzumab, pertuzumab +/- the PI3K inhibitor inavolisib in patients with HER2-positive, HR-positive, PIK3CA mutant early breast cancer - GeparPiPPa

Status
Recruiting
Phases
Phase 2
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2022-501152-28-00
Acronym
GBG 105
Enrollment
260
Registered
2023-07-21
Start date
2022-12-21
Completion date
Unknown
Last updated
2025-12-01

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Breast Cancer

Brief summary

Pathological complete response (ypT0/is ypN0) is defined as no microscopic evidence of residual invasive tumor cells in all resected specimens of the breast and axilla.

Detailed description

ypT0 ypN0 is defined as no microscopic evidence of residual invasive or non-invasive viable tumor cells in all resected specimens of the breast and axilla; ypT0 ypN0/+ is defined as no microscopic evidence of residual invasive or non-invasive viable tumor cells in all resected specimens of the breast; ypT0/Tis ypN0/+ is defined as no microscopic evidence of residual invasive viable tumor cells in all resected specimens of the breast;, Clinical (c) and imaging (i) response will be assessed every 2nd cycle and before surgery by physical examination and imaging tests, Breast conservation is defined as tumorectomy, segmentectomy or quadrantectomy as a most radical surgery, Tolerability and safety analyses include assessment of patients whose treatment had to be dose reduced, delayed or permanently stopped, Survival endpoints are defined as the time period between randomization and first event and will be analyzed after the end of the study by referring to data from GBG´s registries.

Interventions

Sponsors

GBG Forschungs GmbH
Lead SponsorOTHER

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Design outcomes

Primary

MeasureTime frame
Pathological complete response (ypT0/is ypN0) is defined as no microscopic evidence of residual invasive tumor cells in all resected specimens of the breast and axilla.

Secondary

MeasureTime frame
ypT0 ypN0 is defined as no microscopic evidence of residual invasive or non-invasive viable tumor cells in all resected specimens of the breast and axilla; ypT0 ypN0/+ is defined as no microscopic evidence of residual invasive or non-invasive viable tumor cells in all resected specimens of the breast; ypT0/Tis ypN0/+ is defined as no microscopic evidence of residual invasive viable tumor cells in all resected specimens of the breast;, Clinical (c) and imaging (i) response will be assessed every 2nd cycle and before surgery by physical examination and imaging tests, Breast conservation is defined as tumorectomy, segmentectomy or quadrantectomy as a most radical surgery, Tolerability and safety analyses include assessment of patients whose treatment had to be dose reduced, delayed or permanently stopped, Survival endpoints are defined as the time period between randomization and first event and will be analyzed after the end of the study by referring to data from GBG´s registries.

Countries

Belgium, Germany, Italy, Poland, Romania, Slovakia, Spain

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026