Suspended

Adjuvant Radiation Therapy Compared With Observation After Surgery in Treating Women With Estrogen Receptor Positive or Progesterone Receptor Positive Ductal Carcinoma In Situ of the Breast Who Are Receiving Tamoxifen or Anastrozole

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What is being tested

anastrozole

+ tamoxifen citrate
+ adjuvant therapy
Drug
Procedure
Radiation
Who is being recruted

Breast Cancer

From 40 to 70 Years
How is the trial designed

Treatment Study

Phase 2
Interventional
Study Start: April 2004

Summary

Principal SponsorInstitute of Cancer Research, United Kingdom
Last updated: February 9, 2009
Sourced from a government-validated database.Claim as a partner
Study start date: April 1, 2004Actual date on which the first participant was enrolled.

RATIONALE: Radiation therapy uses high-energy x-rays to damage tumor cells. It is not yet known whether radiation therapy after surgery is effective in preventing a recurrence of ductal carcinoma in situ. PURPOSE: This randomized phase II trial is studying adjuvant radiation therapy to see how well it works compared to observation after surgery in treating women with estrogen receptor positive or progesterone receptor positive ductal carcinoma in situ and are also receiving either tamoxifen or anastrozole. OBJECTIVES: Primary * Compare ipsilateral tumor relapse and breast cancer metastases in women with completely excised low-risk estrogen receptor- or progesterone receptor-positive ductal carcinoma in situ of the breast receiving adjuvant tamoxifen or anastrozole and treated with adjuvant radiotherapy vs observation alone. * Compare the quality of life of patients treated with these regimens. Secondary * Determine the minimal surgical margins required to minimize the local recurrence rate in patients treated with these regimens. * Identify molecular markers that predict ipsilateral tumor recurrence in patients treated with these regimens. OUTLINE: This is a randomized, multicenter study. Patients are stratified according to participating center. Patients are randomized to 1 of 2 treatment arms. All patients receive adjuvant tamoxifen or anastrozole for 5 years. * Arm I: Patients undergo radiotherapy 5 days a week for 3 or 5 weeks. * Arm II: Patients undergo observation alone. Quality of life is assessed at baseline, at 6 months, and then at 1, 2, and 5 years. Patients are followed every 6 months for 1 year and then annually for up to 10 years. Peer Reviewed and Funded or Endorsed by Cancer Research UK PROJECTED ACCRUAL: A total of 2,000 patients (1,000 per treatment arm) will be accrued for this study within 5 years.

Official TitleRandomised Trial Testing Observation (No Radiotherapy) Against Radiotherapy In Women With Low-Risk Completely Excised ER Positive Ductal Carcinoma In Situ (DCIS) Of The Breast On Adjuvant Endocrine Therapy 
Principal SponsorInstitute of Cancer Research, United Kingdom
Last updated: February 9, 2009
Sourced from a government-validated database.Claim as a partner

Protocol

This section provides details of the study plan, including how the study is designed and what the study is measuring.
Design Details
2000 patients to be enrolledTotal number of participants that the clinical trial aims to recruit.
Treatment Study
These studies test new ways to treat a disease, condition, or health issue. The goal is to see if a new drug, therapy, or approach works better or has fewer side effects than existing options.

How participants are assigned to different groups/arms
In this clinical study, participants are placed into groups randomly, like flipping a coin. This ensures that the study is fair and unbiased, making the results more reliable. By assigning participants by chance, researchers can better compare treatments without external influences.

Other Ways to Assign Participants
Non-randomized allocation
: Participants are assigned based on specific factors, such as their medical condition or a doctor's decision.

None (Single-arm trial)
: If the study has only one group, all participants receive the same treatment, and no allocation is needed.

Eligibility

Researchers look for people who fit a certain description, called eligibility criteria: person's general health condition or prior treatments.
Conditions
Criteria
FemaleBiological sex of participants that are eligible to enroll.
From 40 to 70 YearsRange of ages for which participants are eligible to join.
Healthy volunteers not allowedIf individuals who are healthy and do not have the condition being studied can participate.
Conditions
Pathology
Breast Cancer
Criteria

DISEASE CHARACTERISTICS: * Diagnosis of unifocal ductal carcinoma in situ of the breast without an invasive component * Microinvasion (defined as 1 or more foci of invasion each \< 1 mm) allowed * Prior complete microscopic excision (within the past 6 months) with a minimum radial margin of 1 mm by specimen x-ray required * Maximum microscopic tumor diameter \< 30 mm (\< 15 mm if grade 3 tumor) * Planning to receive adjuvant tamoxifen or anastrozole for 5 years * Eligible patients may receive adjuvant endocrine therapy on ICR-IBIS-II * Hormone receptor status: * Estrogen receptor positive OR * Progesterone receptor positive * More than 10% tumor staining for receptor OR a cutpoint of ≥ 2 PATIENT CHARACTERISTICS: Sex * Female Menopausal status * Premenopausal, perimenopausal, or postmenopausal Performance status * Not specified Life expectancy * Not specified Hematopoietic * Not specified Hepatic * Not specified Renal * Not specified Cardiovascular * No prior deep vein thrombosis Pulmonary * No prior pulmonary embolus Other * No unexplained postmenopausal bleeding * No contraindication to full-dose radiotherapy to the breast * No other cancer within the past 5 years except nonmelanoma skin cancer or carcinoma in situ of the cervix PRIOR CONCURRENT THERAPY: Biologic therapy * Not specified Chemotherapy * Not specified Endocrine therapy * See Disease Characteristics * No prior tamoxifen or raloxifene use for more than 3 months in duration Radiotherapy * Not specified Surgery * See Disease Characteristics * No prior mastectomy Other * No concurrent anticoagulants


Study Plan

Find out more about all the medication administered in this study, their detailed description and what they involve.
Study Objectives
Study Objectives
Primary Objectives

Secondary Objectives


Study Centers

These are the hospitals, clinics, or research facilities where the trial is being conducted. You can find the location closest to you and its status.
This study has 29 locations
Suspended
Frenchay Hospital at North Bristol NHS TrustBristol, United KingdomSee the location
Suspended
Bristol Haematology and Oncology CentreBristol, United Kingdom
Suspended
Broomfield HospitalBroomefield, United Kingdom
Suspended
Chelmsford and Essex CentreChelmsford, United Kingdom

Suspended29 Study Centers