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Breast CancerNCT00903591

Study of Radiation Exposure and Bilateral Breast Cancer

An observational study of Breast Cancer, run by Memorial Sloan Kettering Cancer Center at 6 sites in 3 countries.

Active, not recruiting

Under way, not looking for participants. Everyone needed has enrolled. The study is still running.

Official record
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Trial summary

This study is being done to find out what factors may be related to the risk of getting a second breast cancer among women who already have breast cancer in one breast. It will look at how genes, treatment for breast cancer; including radiation therapy, and the effects of different lifestyle activities, may affect the… Read more about this study

Who is it for?
Ages 18 to 54 years, women only
Conditions the study is for
Breast Cancer
What is being tested?
questionaire, blood or saliva sample
How many people
1,699 participants
Where
6 sitesin 3 countries
Study dates
May 2009to May 2027
Phase
Observational
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 54 years
  • Women only
  • No healthy volunteers
  • Adult

Study population: All of the WECARE:GWA Study participants (new cases and individually matched controls) will be identified, recruited, and interviewed by investigative teams in the five population-based cancer registries (NCC, OCR, FHCRC, Iowa, and DCS).

Who may be able to join

  • Eligibility for Cases: All women who meet the following eligibility requirements will be recruited as cases for the WECARE:GWA Study if they are not already cases (or refusers) from the parent WECARE Study:
  • Diagnosed since 1/1/1990 with a histologically confirmed first primary breast cancer (only invasive stage 1 or 2) while residing in one of the study enrollment site (cancer registry);
  • Diagnosed since 1/1/1992 with CBC (invasive only any stage) while residing in the same enrollment site (cancer registry);
  • Two years or longer time interval between first and second primaries; Between the ages of 18 and 54 at the time of diagnosis of the first primary;
  • Alive at time of contact; and
  • No history of previous or intervening cancer diagnosis, except cervical cancer in situ (CIS) or non-melanoma skin cancer.
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  • Without bilateral mastectomy or prophylactic mastectomy of the contralateral breast following diagnosis of their first primary.
  • Eligibility for Controls: Women who meet all of the following requirements will be eligible as controls. One matched control will be recruited for each participating case:
  • Diagnosed since 1/1/1990 with their first primary breast cancer (only invasive stage 1 or 2) while residing in one of the study enrollment site (i.e., cancer registry);
  • Between the ages of 18 and 54 at the time of diagnosis of the first primary;
  • Residing in the same study enrollment site (cancer registry) as when they were diagnosed with their breast cancer;
  • Alive at time of contact;
  • Never diagnosed (at reference date (date of first diagnosis plus "at risk interval" of matched case)) as having had CBC or any other cancer diagnosis other than the original breast cancer; with the exception of CIS or non-melanoma skin cancer.
  • Without bilateral mastectomy or prophylactic mastectomy of the contralateral breast following diagnosis of their first primary.
  • Matching of Controls: Controls eligible for inclusion in this study will be individually matched (1:1) to cases on:
  • Enrollment site (cancer registry);
  • Age at diagnosis of the cases first primary(within 5-year age groups);
  • Year of diagnosis of the cases first primary;(within 4-year categories);
  • Race/ethnicity (white, black, Latina, Asian, other).

Who cannot join

  • Exclusion for Cases: Women with any of the following characteristics will be ineligible as a case:
  • Unable to speak English in U.S. or Canadian enrolling sites or Spanish in the California site, and Danish in Denmark
  • Unable to sign informed consent
  • Stage IV distant metastases for either the first or second primary (lymph node metastasis is acceptable, but there should be no organ involvement
  • Simultaneous diagnosis of invasive in one breast and in situ in the other breast
  • Exclusion for Controls: Women with any of the following characteristics will be ineligible as a control:
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  • Unable to speak English in U.S. and Canadian enrolling sites, or Spanish in the California site and Danish in Demark
  • Unable to sign informed consent
  • Stage IV distant metastases (lymph node metastasis is acceptable, but there should be no organ involvement

Trial locations and contacts

6 sites in 3 countries.

6 sites in 3 countries

United States4 sites
  • University of Iowa

    Iowa City, Iowa, 52242

  • Memorial Sloan Kettering Cancer Center

    New York, New York, 10065

  • Fred Hutchinson Cancer Research Center

    Seattle, Washington, 98109

  • Stanford University

    Stanford, California, 94305

Other trials in United States

Canada1 site
  • ONTARIO CANCER REGISTRY, Mount Sinai Hospital, Toronto

    Toronto, Ontario, M5G 1X5

Other trials in Canada

Denmark1 site
  • Danish Cancer Society

    Copenhagen

Other trials in Denmark

About this study

Official title: Genome-Wide Association Study of Radiation Exposure and Bilateral Breast Cancer

This study is being done to find out what factors may be related to the risk of getting a second breast cancer among women who already have breast cancer in one breast. It will look at how genes, treatment for breast cancer; including radiation therapy, and the effects of different lifestyle activities, may affect the risk of breast cancer. It will use different processes to find genes that might increase the risk of breast cancer. The results of this study may help to develop better ways to detect, treat and prevent breast cancer. This study will compare women who have breast cancer in both breasts to women who have breast cancer in only one breast.

Read the detailed description

This study expands upon an existing case-control study we call the Women's Environment Cancer and Radiation Epidemiology (WECARE) Study. For simplicity, in this protocol, we will refer to that study as the "parent" study. The goal of both studies is to examine the interaction of radiation exposure and genetic susceptibility factors in the etiology of breast cancer. A subset of study participants who consented to 'future contact' in the GWA Study (and those in the 'parent' study from selected sites) will be included in an analysis of radiation-related heart disease and related conditions.

Conditions
Breast Cancer
Being tested
questionaire, blood or saliva sample
Keywords
Breast, cancer, 09-040, blood sample, saliva sample, WECARE, GWA
Medical subject headings
Breast Neoplasms, Neoplasms

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • questionaire, blood or saliva sampleOther

    Also called The women who consented to 'future contact' in the WECARE:GWAS Study will be, identified, approached, and interviewed by investigative teams in the five data collection sites, (CPIC, MSHT, FHCRC, Iowa, and DCS) over approximately 8 months. Across all data, collection sites, we will approach all eligible cases and controls who consented to future contact

    Take part in an approximately 45 minute telephone interview, with questions about detailed treatment (chemotherapy, hormonal therapy, radiation therapy (RT)) for all study participants. Their medical records will be reviewed to get further details about treatment of their breast cancer. They donate either a 35 ml blood sample (about 3 tablespoons) or a saliva sample. Blood Sample: if patient consents to give a blood sample, following the interview, they will be contacted by our staff phlebotomist (a person trained to draw blood). A scheduled appointment to draw a blood sample from you at your home. At the time of the blood draw, the phlebotomist will collect approximately 2 and 1/3 tablespoons of blood. Saliva Sample: if they choose not to give a blood sample, but consent to give a saliva sample instead, a saliva kit will be sent to there home. Once they provide the sample in the kit, they will be asked to mail back the sample in the pre-labeled kit that was sent to them.

Study groups in NCT00903591
Study groupRoleWhat they receive
1All women will be interviewed by telephone using the a similar questionnaire as used in the parent study. DNA samples will be obtained either via blood samples drawn during a home or clinic visits, or an Oragene Saliva DNA Self-Collection Kit sent to the participant's home.
Receives: Other: questionaire, blood or saliva sample

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Identify single nucleotide polymorphism's that are associated with contralateral breast cancer using a two-stage approach in a population-based case-control study.

    Measured: 2.5 years

Secondary outcomes (3)
  1. Identify single nucleotide polymorphism that interact with radiation exposure.

    Measured: 2.5 years

  2. Replication. Using the entire WECARE Study population, determine whether genomic regions found to be associated with unilateral breast cancer as identified via independent genome-wide association studies conducted by other research groups.

    Measured: 2.5 years

  3. Characterize genomic regions containing variants associated with contralateral breast cancer and/or radiation-induced breast cancer in a population-based nested case-control study design.

    Measured: 2.5 years

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted18 May 2009 (estimated)
  2. Study startMay 2009
  3. Primary completionMay 2027 (estimated)
  4. Study completionMay 2027 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Observational
Observational model
Case-control
Time perspective
Prospective
Enrolment
1,699 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT00903591
Sponsor's protocol ID
09-040
Other IDs
R01CA129639-01A2
Status last verified
Jun 2026
First submitted
15 May 2009
Last updated
3 Jun 2026
Results posted
No

Questions about this trial

What is this clinical trial studying?

An observational study of Breast Cancer, run by Memorial Sloan Kettering Cancer Center at 6 sites in 3 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 19 inclusion and 9 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: under way, not looking for participants, as of the sponsor's last update on 3 Jun 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 6 sites in United States, Canada, Denmark. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Identify single nucleotide polymorphism's that are associated with contralateral breast cancer using a two-stage approach in a population-based case-control study. (time frame: 2.5 years). It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 3 Jun 2026.

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