Reasons for Changing HOrmonal Therapy of Advanced Breast Cancer

Study Overview
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Brief Summary
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Breast cancer is the leading type of cancer in women. Although big advance in diagnostics and treatment of early and breast cancer has been made in recent years breast cancer still has a significant mortality rate. A number of treatment modalities exist for postmenopausal women with advanced breast cancer. The treatment modality is chosen based on patient and tumour characteristics. Hormonal treatment is preferred and recommended in women with hormone sensitive breast cancer (ESMO, CECOG and NCCN guidelines). Tumor markers are an established method of monitoring systemic therapies in various cancers. Tumor markers CA 15-3 and CEA are used in clinical practice to monitor treatment efficacy of metastatic breast cancer. Blood levels of tumor markers are widely used to assess response/progression to treatment and guide therapy change. Treatment efficacy is assessed by imaging methods in clinical studies. Change of therapy in clinical study is usually done when progression based on RECIST criteria is found. Hormonal treatment has slower onset of effect compared with chemotherapy that can last several weeks. Also when a new therapy is started spurious early rises may occur. Therefore rising levels of tumor markers during the first weeks of new hormonal therapy are not necessarily sign of progression and should not be the only guidance for treatment change. Evidence of treatment efficacy form clinical studies and treatment change is based on imaging techniques.

Official Title
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Reasons for Changing HOrmonal Therapy of Advanced Breast Cancer

Conditions
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Breast Cancer

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Women with at least two finished lines of hormonal treatment for advanced breast cancer Tumor markers (CEA. CA15-3) values available at the time of onset and discontinuation of therapy Imaging methods results available at the time of onset and discontinuation of therapy Exclusion Criteria: None
Sexes Eligible for Study
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Female

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| All patients<br>Patients with ABC and two lines of hormonal treatment | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Reasons for change of hormonal therapy (biochemical progression, objective progression, symptomatic progression, safety reasons, other) |  | Every 3 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Changes in values of tumor markers (CEA, CA 15.3) |  | Every 3 months. | 
| Time to progression |  | Every 3 months | 
| Type of hormonal treatment |  | Every 3 months. | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Advanced Breast Cancer, Hormonal Treatment