Assessing breast cancer risk using ultrasound in women with dense breasts

Association of Sonographic Glandular Tissue Component With Breast Cancer Risk Among Women With Dense Breasts: A Prospective, Multinational Validation Study

Observational Seoul National University Hospital · NCT05460975

This study is testing if using ultrasound to measure glandular tissue in women with dense breasts can help predict their risk of developing breast cancer.

Quick facts

Study typeObservational
Enrollment16164 (estimated)
Ages40 Years to 69 Years
SexFemale
SponsorSeoul National University Hospital Academic / other
Locations1 site (Seoul)
Trial IDNCT05460975 on ClinicalTrials.gov

What this trial studies

This international multicenter study aims to validate the association between sonographic glandular tissue component (GTC) and the risk of developing breast cancer in women with dense breasts. It will enroll 16,164 women aged 40 to 70 who have dense breast tissue as classified by mammography. The study will assess the amount of glandular tissue relative to fibrous stroma using breast ultrasound and will track participants for breast cancer diagnosis over time. The goal is to determine if GTC can provide additional risk assessment information beyond existing factors.

Who should consider this trial

Good fit: Ideal candidates are women aged 40 to 70 with dense breasts (BI-RADS categories C and D) and no history of breast cancer.

Not a fit: Patients with a history of breast cancer, certain surgical histories, or who are currently pregnant or breastfeeding may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could enhance breast cancer screening and risk assessment for women with dense breasts.

How similar studies have performed: Previous studies have shown a potential link between sonographic GTC and breast cancer risk, but this study aims to prospectively validate those findings on a larger scale.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria

1. be ≥ 40 and \<70 years old at time of US
2. No history of previous breast cancer including DCIS
3. have dense breasts (BI-RADS category C and D on mammography performed within 12 months of breast US) and negative/benign BI-RADS assessment categories on mammography (BI-RADS 1, 2)
4. undergoing screening breast US using either automated or handheld device

Exclusion Criteria

1. history of bilateral prophylactic mastectomy
2. history of bilateral foreign body injection
3. history of bilateral breast implants
4. history of bilateral breast reduction surgery or surgical excision
5. currently pregnant or breast feeding in the preceding 6 months
6. Known distant metastasis from other primary cancer

Where this trial is running

Seoul

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 CancerScreeningBreast cancerDense breastRisk factorsUltrasonography
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.