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Trackers› Clinical trials› Breast cancer
Clinical trial register · European Union · CTIS

Breast cancer Clinical Trials in the EU, 2026

The most recently authorised trials on the EU Clinical Trials Information System (CTIS), the single register for every trial run under the EU Clinical Trials Regulation (536/2014). CTIS holds a far larger historical archive than any one list can usefully show โ€” this register states both numbers rather than picking one.

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Source: EMA Clinical Trials Information System (CTIS). Showing the 2500 most recently authorised of 12490 total CTIS records โ€” a stated recency window, not the full historical archive. Synced 25 Sep 2026, 03:16 UTC
2500
Shown in this register
most recently authorised
12,490
Total on CTIS
full historical archive
741
Phase III
within the shown window
Top member states
Spain 1016 France 881 Germany 860 Italy 735 Poland 585 Netherlands 531
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Trials for Breast cancer

11 of 2500 shown studies
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Phase
Study
Lead sponsor
Area
Member states
Decision
Phase II
Optimization of De-EscalatiON strategies in early breast cancer
2026-527524-27-00breast cancer
Istituto Di Candiolo Fondazione Del Piemonte Per L'Oncologia IRCCS
Neoplasms
Italy
14/09/2026
Phase III
Premedication with dexamethasone for preventing interstitial lung disease in patients with breast cancer treated with trastuzumab deruxtecan
2025-521798-15-00Breast Cancer
Istituto Di Ricerche Farmacologiche Mario Negri
Neoplasms
Italy
11/08/2026
Phase III
PROPHY-SEIN - Evaluation of the effect of antibiotic prophylaxis during lumpectomy for breast cancer: prospective randomised double-blind noninferiority study of placebo vs cefazolin
2025-525020-99-00Breast Cancer
University Hospital Of Clermont-Ferrand
Not possible to specify
France
16/07/2026
Phase IV
Is magnesium sulfate an alternative with an analgesic and safety profile equivalent to dexmedetomidine as an adjuvant to ropivacaine in erector block in mastectomy?
2025-523152-31-00Breast cancer
Fundacion Para El Fomento De La Investigacion Sanitaria Y Biomedica De La Comunitat Valenciana
Neoplasms
Spain
03/11/2025
Phase IV
ENDO-67 project: Investigating ENDOcrine therapy-related questions using Ki67 changes in the window-of-opportunity before breast surgery
2025-521385-10-00Breast cancer
Erasmus Universitair Medisch Centrum Rotterdam (Erasmus MC)
Neoplasms
Netherlands
21/10/2025
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Cite this view

Priya Life Science (2026). EU Clinical Trials Register (CTIS), filtered. Derived from the EMA Clinical Trials Information System. Retrieved 25 September 2026. https://priyalifescience.com/clinical-trials-europe/condition/breast-cancer

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About this register

This register is built from the EU Clinical Trials Information System (CTIS), run by the European Medicines Agency: the single register for every trial authorised under the EU Clinical Trials Regulation (536/2014). CTIS held 12,490 trial records at the last sync on 25 Sep 2026, 03:16 UTC; this register shows the 2,500 most recently authorised of them, a stated recency window rather than the full archive. The list can be downloaded as CSV or JSON.

This page shows the 11 of those trials with a site in Breast cancer.

How many recently authorised EU trials have a site in Breast cancer?

11 of the 2,500 most recently authorised trials in this register list a site in Breast cancer; 4 of them are Phase III. Trials are counted by authorisation on CTIS, not by recruitment status, which CTIS does not publish in the same form as ClinicalTrials.gov.

Summary by phase

Trials by phase (Breast cancer), 11 trials
PhaseTrialsShare
Phase III436.4%
Phase IV327.3%
Phase I/II218.2%
Phase II218.2%

Most active sponsors

Lead sponsors with the most trials (Breast cancer)
Lead sponsorTrials
Alx Oncology Holdings Inc.1
AstraZeneca AB1
Centre Henri Becquerel1
Erasmus Universitair Medisch Centrum Rotterdam (Erasmus MC)1
Fundacion Para El Fomento De La Investigacion Sanitaria Y Biomedica De La Comunitat Valenciana1
Fundacion Ribera Salud1
Istituto Di Candiolo Fondazione Del Piemonte Per L'Oncologia IRCCS1
Istituto Di Ricerche Farmacologiche Mario Negri1
Karolinska Institutet1
Leids Universitair Medisch Centrum (LUMC)1
Listing here is informational and not medical advice; eligibility is determined by each study team. Looking for Irish sites? See the Ireland, UK or USA registers. For approved medicines, see the EMA Approvals Tracker.