Breast biomechanics and bra support after surgery and radiotherapy.

Breast Cancer BRAs Study (Breast Cancer Biomechanics of Radiotherapy And Surgery): The Effects of Breast Surgery and Radiotherapy on the Breast Biomechanics and Breast Support Requirements of Women Treated for Breast Cancer.

Observational Portsmouth Hospitals NHS Trust · NCT07135960

We will test whether 3D scans and sensors can measure how surgery with or without radiotherapy changes breast movement and bra support needs in women treated for unilateral breast cancer.

Quick facts

Study typeObservational
Enrollment45 (estimated)
Ages18 Years and up
SexFemale
SponsorPortsmouth Hospitals NHS Trust Government
Locations1 site (Portsmouth)
Trial IDNCT07135960 on ClinicalTrials.gov

What this trial studies

Researchers at Portsmouth Hospitals and the University of Portsmouth will recruit women treated for unilateral breast cancer from Queen Alexandra Hospital and invite them to the University of Portsmouth biomechanics lab for testing after surgery and/or after radiotherapy, with an optional pre-surgery visit. The protocol uses 3D surface scans and wearable sensors to quantify breast shape and movement, comparing the treated breast to the contralateral breast as an internal control. Participants will complete short questionnaires about their bra requirements, exercise habits, and their experience of the testing procedures. The study excludes people with metastatic or bilateral disease, recent surgery or radiotherapy within the exclusion windows, active postoperative infection or dressings, pregnancy or breastfeeding, epilepsy, high frailty, or those requiring an interpreter.

Who should consider this trial

Good fit: Ideal candidates are women aged 18 or older with unilateral early or locally advanced breast cancer who have had or will have surgery with or without adjuvant radiotherapy and can travel to the University of Portsmouth biomechanics laboratory and provide informed consent.

Not a fit: People with metastatic or bilateral breast cancer, very recent surgery or radiotherapy within the exclusion timeframes, active postoperative breast infection or dressings, pregnancy or breastfeeding, epilepsy, high frailty, prior contralateral breast surgery, or who require an interpreter are not eligible and are unlikely to benefit from participation.

Why it matters

Potential benefit: If successful, this could lead to better-targeted bra and support recommendations that improve comfort, reduce tissue strain, and enhance quality of life after breast cancer treatment.

How similar studies have performed: Biomechanics measurements have been used in healthy women and athletes, but applying these methods to guide bra support after breast cancer surgery or radiotherapy is largely novel and not yet established.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Female
* 18 years of age or above
* Early or locally advanced breast cancer classified as B5a or B5b (radical treatment intent)
* Unilateral breast cancer (contralateral breast used as control)
* Receiving or has received breast cancer surgery
* +/- Adjuvant radiotherapy
* Able to travel to the University of Portsmouth Breast biomechanics laboratory
* Participant has capacity to consent.

Exclusion Criteria:

* Metastatic breast cancer diagnosis
* \< 2 weeks post-operative
* \< 4 weeks post-radiotherapy
* Active post-operative breast infection
* Requirement of ongoing breast dressings
* Previous breast surgery to contralateral breast
* Bilateral breast cancer
* Epilepsy (due to strobe on 3D scanner)
* Pregnancy or \<6 weeks post-partum
* Breastfeeding
* Rockwood Frailty score \>5 (or those unable to ambulate un-aided)
* Requiring interpreter.

Where this trial is running

Portsmouth

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Breast Cancer Patients
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.