A blood test may spot breast cancer's return before symptoms appear
NCT ID NCT07718841
First seen Jul 22, 2026 · Last updated Jul 23, 2026 · Updated 1 time
Summary
This observational study is testing whether a blood test called a liquid biopsy can provide useful information for people with early-stage breast cancer who are about to start treatment before surgery. The test looks for tiny fragments of tumor DNA circulating in the blood. Researchers want to know if this test can help predict how the tumor will respond to treatment, detect any cancer left after treatment or surgery, and spot a recurrence earlier than standard scans. Participants will give blood samples at several time points while continuing their usual care.
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 successful, liquid biopsy could become a standard tool to personalize breast cancer treatment and catch recurrence earlier.
- What could go wrong
- This is an observational study, not a treatment trial, so it will not directly test a new therapy. The results may not change practice immediately.
This is an AI summary of the original study and may miss details. Read our disclaimer.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
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Study contacts
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Phone: •••-•••-•••• Email: •••••@•••••
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Contact
Phone: •••-•••-•••• Email: •••••@•••••
Locations
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Hospital Clínico Universitario San Carlos
Madrid, Madrid, 28040, Spain
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Hospital Clínico Universitario Virgen De la Victoria
Málaga, Málaga, 29010, Spain
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Hospital Clínico Universitario de Valencia
Valencia, Valencia, 46010, Spain
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Hospital General Universitario Gregorio Marañon
Madrid, Madrid, 28009, Spain
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Hospital Universitario Donostia
San Sebastián, Guipúzcoa, 20014, Spain
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Hospital Universitario Virgen Macarena
Seville, Sevilla, 41009, Spain
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Hospital Universitario Virgen del Rocío
Seville, Sevilla, 41013, Spain
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Hospital Universitario de Toledo
Toledo, Toledo, 45007, Spain
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Hospital del Mar
Barcelona, Barcelona, 08003, Spain
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Instituto Valenciano de Oncologia
Valencia, Valencia, 46009, Spain
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