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Enrolling by invitationNCT04098640Updated Apr 17, 2025

Molecular Profiling in Young (<50 Years of Age) Patients With Metastatic Breast Cancer

An interventional study of FoundationOne CDx in Breast Cancer, sponsored by Seoul National University Hospital. Enrolling by invitation at 1 site in Korea, Republic of. Open to female participants aged 19 Years to 50 Years. Per ClinicalTrials.gov, last updated 2025-04-17.

Sponsored by Seoul National University Hospital · Not applicable, Interventional, and Diagnostic

From the registry’s dates

  • Primary completion was expected by Dec 2025, 9 months ago, but the record still lists the study as enrolling by invitation.
Phase
Not applicable
Study type
Interventional
Enrollment
200
Allocation
Not applicable
Ages
19 Years to 50 Years
Sex
Female
01

Study summary

Breast cancer is the most common cancer in women worldwide, especially in developed countries. In developing countries, including South Korea, the incidence and mortality rate of breast cancer is rapidly increasing. One of the most important characteristics of breast cancer in South Korea, as well as in other Asian countries, is the younger onset of disease compared to Western.

Medical treatment of breast cancer is evolving rapidly, incorporating immune checkpoint blockades and molecularly targeted agents. However, data and knowledge are still limited in terms of molecular characteristics of Asian breast cancer, compared to that of Western countries, and this remains a major hurdle for drug development in Asian breast cancer patients.

The primary objective of this study is to elucidate the genetic characteristic of young (\<50 years of age) Korean patients with metastatic breast cancer using FoundationOne CDx.

Read the detailed description

Secondary Objective(s):

  1. To evaluate the prognostic and predictive role of tumor mutation burden.
  2. To reveal the correlation between genetic characteristics and immunohistochemical expression of selected proteins (including DNA damage repair (DDR) molecules and various immune modulating molecules including PD-L1, PD-1, IDO, and OX40).
  3. Compare molecular characteristics of breast cancer according to age groups (\<35 years vs. 35-50 years).
  4. To offer genomic profiling guided therapy to patients as early as possible (preferably, 1st- or 2nd-line of treatment). In addition, to explore how genomic profiling guided therapy could improve patient outcome as an ad-hoc if sufficient number of patients can be followed up (compared to historic data).
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Conditions studied

  • Breast Cancer

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Keywords

  • Young patient
  • Asian
03

In context

Breast Neoplasms

12,543 studies on the registry are indexed under Breast Neoplasms; 2,892 are open to participants now.

This study's planned enrollment of 200 is above the median of 72 across 9,302 interventional studies indexed under Breast Neoplasms.

Browse Breast Neoplasms studies →

Lead sponsor

Seoul National University Hospital is the lead sponsor of 1,860 studies on the registry; 275 are open to participants now.

Of its 12 completed or terminated interventional studies of FDA-regulated products, 2 (17%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
19 Years to 50 Years
Sexes eligible
Female
Accepts healthy volunteers
No

Inclusion criteria

  • Patients between 19 - 50 years of age on the day of signing informed consent.
  • Able to provide written informed consent for voluntary participation in the trial.
  • With metastatic breast cancer
  • Willing to provide biopsies from the primary tumor or lymph nodes at screening to the central laboratory. (with at least 10 unstained slides and 1 H\&E slide)

Exclusion criteria

Exclusion Criteria:

  • Has known psychiatric or substance abuse disorders that would interfere with cooperation with the requirements of the study.
05

Study design

Phase
Not applicable
Primary purpose
Diagnostic
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
200 participants (estimated)

Study arms

  • Other
    FMI

    FoundationOne CDx will be performed using archival tumor tissue

    Genetic: FoundationOne CDx

Interventions

  • GeneticFoundationOne CDx

    FoundationOne CDx will be performed using archival tumor tissue

06

What researchers measure

Primary outcomes

  1. Genetic characteristic of young (<50 years of age) Korean patients with metastatic breast cancer.

    Genetic characteristics will be evaluated using FoundationOne CDx.

    Time frame: After the end of patient enrollment

Secondary outcomes

  1. Evaluate the prognostic and predictive role of tumor mutation burden

    Tumor mutation burden will be analysed using FoundationOne CDx.

    Time frame: After the end of patient enrollment

  2. Reveal the correlation between genetic characteristics and immunohistochemical expression of selected proteins.

    FoundationOne CDx results and immunohistochemical expression will be analysed.

    Time frame: After the end of patient enrollment

  3. Compare molecular characteristics of breast cancer according to age groups.

    Genetic characteristics will be analysed according to age groups.

    Time frame: After the end of patient enrollment

  4. To offer genomic profiling guided therapy to patients To explore how genomic profiling guided therapy could improve patient outcome as an ad-hoc if sufficient number of patients can be followed up (compared to historic data).

    The result of FoundationOne CDx will be used in patient treatment

    Time frame: After the end of patient enrollment

07

Study locations

1 site
  • Seoul National University Hospital
    Seoul, 110-744, Korea, Republic of
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References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Apr 17, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT04098640
Lead sponsor
Seoul National University Hospital
Responsible party
Seock-Ah Im (Professor, Seoul National University Hospital) — Principal investigator
First posted
Sep 23, 2019
Start date
Sep 23, 2019
Primary completion
Dec 31, 2025 (estimated)
Completion
Dec 31, 2025 (estimated)
Last update
Apr 17, 2025

Study contacts

Seock-Ah Im, MD PhD
principal investigator · Seoul National University Hospital

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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No contact was published for this record. The registry link below has the sponsor’s details.

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