A Single Arm, Tolerability and Safety Phase IV Study of Fulvestrant(Faslodex® ) as 2nd Line and Later Therapy in Postmenopausal Women With Locally Advanced or Metastatic Breast Cancer

A Single Arm, Tolerability and Safety Phase IV Study of Fulvestrant(Faslodex® ) as 2nd Line and Later Therapy in Postmenopausal Women With Locally Advanced or Metastatic Breast Cancer

A Single Arm, Tolerability and Safety Phase IV Study of Fulvestrant(Faslodex® ) as 2nd Line and Later Therapy in Postmenopausal Women With Locally Advanced or Metastatic Breast Cancer

This single-arm study aims to assess the safety and tolerability profile of Fulvestrant(Faslodex®) as 2nd line and later therapy in postmenopausal women with locally advanced or metastatic breast cancer. The primary objective is to evaluate the adverse events after Fulvestrant (Faslodex®) for about 6 months

This study is a Phase 4, single-arm, safety and tolerability study of fulvestrant (Faslodex®) as 2nd line therapy in postmenopausal women with locally advanced or metastatic breast cancer. All of enrolled patients in this study will be injected fulvestrant (Faslodex®). This study will be performed for about 3 years and approximately 100 patients(actual target will be 80 treated patients) will be enrolled in about 10 investigational sites. After obtaining the written informed consent from the patients, the information of demographic and medical history will be collected and laboratory tests will be performed. Patients who meet the inclusion/exclusion criteria will be injected the fulvestrant (Faslodex®) 500mg/month for about 6 months with an additional 500mg dose given 14 days after the initial dose injection. The information of adverse events will be collected after the 1st dose of IP injection. In case that the evaluation of tumor response might be performed in regular clinical practice, those data will also be collected as well. The quality of life will also be measured.

fulvestrant (Faslodex®) 500mg/month for about 6 months with an additional 500mg dose given 14 days after the initial dose injection.

Adverse events were collected from treatment initiation to end of the study about 6 months for each patient.

Inclusion Criteria: Post menopausal status women Outpatient or inpatient with locally advanced or metastatic breast cancer who have failed with prior anti-estrogen therapy. Estrogen receptor positive Radiographic progression of disease after the prior therapy Patients who agree to participate in this study and sign the informed consent Exclusion Criteria: Patients who are treated with fulvestrant Patients who are being treated with the other antitumor agents Pregnancy or lactating women History of hypersensitivity to any of included ingredients (eg. Castor oil) Patients who are considered not fit for the study by investigators Patients who have severe dysfunction of liver or kidney

Qualified researchers can request access to anonymized individual patient-level data from AstraZeneca group of companies sponsored clinical trials via the request portal. All request will be evaluated as per the AZ disclosure commitment: https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure

AstraZeneca will meet or exceed data availability as per the commitments made to the EFPIA Pharma Data Sharing Principles. For details of our timelines, please rerefer to our disclosure commitment at https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure.

When a request has been approved AstraZeneca will provide access to the de-identified individual patient-level data in an approved sponsored tool . Signed Data Sharing Agreement (non-negotiable contract for data accessors) must be in place before accessing requested information. Additionally, all users will need to accept the terms and conditions of the SAS MSE to gain access. For additional details, please review the Disclosure Statements at https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure.