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Anesthesia choice during breast surgery may influence cancer return years later

NCT ID NCT07689253

Knowledge-focused Sponsor: University of Zurich Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jul 08, 2026 · Last updated Jul 09, 2026 · Updated 1 time

Summary

This study follows women who had breast cancer surgery to see if the type of anesthesia they received—propofol or sevoflurane—affects cancer recurrence and survival 5 and 10 years later. Only patients from an earlier trial are included. The goal is to understand whether anesthesia technique can influence long-term outcomes.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
If a link is found, it could guide anesthesia choices to improve long-term outcomes for breast cancer patients.
What could go wrong
This is an observational follow-up, not a new treatment test. Results may show no difference between anesthesia types, and the small size limits general conclusions.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

161 people

The number who actually took part.

Started

Sep 2025

Finished

Apr 2026

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Only patients who participated in the clinical trial (CEC 2016 - 01791) can be included into this study.

Ages

18 years and older

Sex

Female participants only

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Only patients who consented and participated in the trial CEC N° 2016 - 01791 can be enrolled. * GC must be available for patients with follow-up consultations at USZ. * For patients with follow-up consultations outside of the USZ for those with unknown GC status, and for those who declined the GC, a study-specific written informed consent must be obtained, which will allow the research team to contact the responsible physician Exclusion Criteria: * Declined study-specific informed consent * Inability to provide study-specific consent

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Conditions

The condition(s) this trial relates to.

breast cancer female breast carcinoma Neoplastic Cells, Circulating

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Breast cancer females Circulating tumor cells.breast Follow up analysis

Contacts and locations

Locations

  • University Hospital Zurich, Institute of Anesthesiology and Perioperative Medicine

    Zurich, Canton of Zurich, 8091, Switzerland

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