Tamoxifen Citrate in Treating Patients With Metastatic or Recurrent Breast Cancer

Breast Cancer Clinical Trial

Official title:

A Phase II Prospective Trial Correlating Progression Free Survival With CYP2D6 Activity in Patients With Metastatic Breast Cancer Treated With Single Agent Tamoxifen

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT01124695
• Other study ID #: E3108
• Secondary ID: E3108U10CA180794
• Status: Completed
• Phase: Phase 2
• Start date: January 7, 2011
• Est. completion date: December 2022

Study information

• Verified date: June 2023
• Source: Eastern Cooperative Oncology Group
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

RATIONALE: Estrogen can cause the growth of breast cancer cells. Hormone therapy using tamoxifen citrate may fight cancer by blocking the use of estrogen by tumor cells.

PURPOSE: This phase II trial is studying how well tamoxifen citrate works in patients with metastatic or recurrent breast cancer.

Description:

OBJECTIVES:

Primary

• To correlate CYP2D6 (Cytochrome P450 2D6) score (0 vs 1-2) and progression-free survival (PFS)

Secondary

• To correlate CYP2D6 score (0 vs 1 vs 2) and PFS

• To correlate CYP2D6 score (0 vs 1-2) and the proportion of these patients who are progression-free at 6 months.

• To correlate endoxifen concentration with response

• To correlate CYP2D6 with response

• To correlate the presence of candidate estrogen receptor (ESR) 1 and 2 variant alleles, UDP-glucuronosyltransferases (UGT) 7, sulfotransferases (SULT) 1A1, other candidate genes and biomarkers to PFS and other tamoxifen related outcomes

OUTLINE: This is a multicenter study.

Patients receive oral tamoxifen citrate once daily on days 1-28. Treatment repeats every 28 days in the absence of disease progression or unacceptable toxicities.

Blood, plasma, and tissue samples are collected periodically for laboratory studies.

After completion of study therapy, patients are followed up every 3-6 months for 5 years.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 124
• Est. completion date: December 2022
• Est. primary completion date: November 30, 2020
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Histologically confirmed adenocarcinoma of the breast

• Stage III (locally advanced), metastatic, or recurrent disease

• Deemed not resectable

• Estrogen-receptor and/or progesterone-receptor positive disease

• Receptor status is based on most recent results

• Measurable or non-measurable disease

• ECOG performance status 0-2

• History of central nervous system (CNS) metastasis allowed provided it has been treated (surgery, radiotherapy, or radiosurgery) within the past 4 weeks and does not require medications to control symptoms

• Total bilirubin = 1.5 times upper limit of normal (ULN)

• Alanine transaminase (ALT) and aspartate transaminase (AST) = 2.5 times ULN (= 5 times ULN if liver metastases present)

• Negative pregnancy test

• Fertile patients must use effective nonhormonal contraception

• Disease-free of prior invasive malignancies for = 5 years with the exception of curatively-treated basal cell or squamous cell carcinoma of the skin or carcinoma in situ of the cervix

• Prior chemotherapy, trastuzumab, or bevacizumab in the adjuvant setting allowed provided it has been completed = 4 weeks before study therapy; other prior non-hormonal investigational agents in the adjuvant setting must have been completed at least 4 weeks prior to study registration and should be discussed with the study PI

• Prior tamoxifen as adjuvant treatment is allowed as long as the patient did not have disease relapse or progression while on adjuvant tamoxifen or within 4 weeks of last dose

• Treatment in the advanced setting must have been completed at least 2 weeks prior to study initiation

• Prior aromatase inhibitors (e.g., anastrozole, letrozole, exemestane, aminoglutethamide) are allowed in the adjuvant or metastatic setting

• At least 2 weeks since prior and no concurrent medications that are strong to moderate inhibitors of CYP2D6 and may alter tamoxifen citrate metabolism including, but not limited to, any of the following:

• Paroxetine (Paxil)

• Fluoxetine (Prozac)

• Bupropion (Wellbutrin)

• Quinidine (Cardioquin)

• Concurrent radiotherapy to painful sites of bone disease or areas of impending fractures allowed provided the following criteria are met:

• Radiotherapy was initiated before study entry

• Sites of measurable or non-measurable disease are outside the radiotherapy port

• Recovered from prior radiotherapy

Exclusion Criteria:

• Pregnant or nursing

• Concurrent chemotherapy

• Leptomeningeal disease

• Non-protocol concurrent hormonal therapy

• Medical or psychiatric conditions that would interfere with protocol compliance, the ability to provide informed consent, assessment of response, or anticipated toxicities

• Prior tamoxifen for advanced disease

• More than 2 lines of non-hormonal treatment in the locally advanced or metastatic setting, including trastuzumab (Herceptin), bevacizumab, or other biologics

• Starting bisphosphonate therapy while receiving treatment on this study

• Patients who have begun receiving bisphosphonate therapy prior to registration may continue at the same intervals used prior to study registration

Related Conditions & MeSH terms

• Breast Cancer
• Breast Neoplasms
• Stage IV Breast Cancer

Intervention

Drug:
• tamoxifen
PO

Locations

Country	Name	City	State
Canada	British Columbia Cancer Agency - Vancouver Cancer Centre	Vancouver	British Columbia
Peru	Instituto Nacional de Enfermedades Neoplasicas	Lima
United States	Kapiolani Medical Center at Pali Momi	'Aiea	Hawaii
United States	Hickman Cancer Center at Bixby Medical Center	Adrian	Michigan
United States	McDowell Cancer Center at Akron General Medical Center	Akron	Ohio
United States	Lovelace Medical Center - Downtown	Albuquerque	New Mexico
United States	University of New Mexico Cancer Center	Albuquerque	New Mexico
United States	McFarland Clinic, PC	Ames	Iowa
United States	Island Hospital Cancer Care Center at Island Hospital	Anacortes	Washington
United States	University of Michigan Comprehensive Cancer Center	Ann Arbor	Michigan
United States	Langlade Memorial Hospital	Antigo	Wisconsin
United States	Aurora Presbyterian Hospital	Aurora	Colorado
United States	Greenebaum Cancer Center at University of Maryland Medical Center	Baltimore	Maryland
United States	Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins	Baltimore	Maryland
United States	Cleveland Clinic Beachwood Family Health and Surgery Center	Beachwood	Ohio
United States	St. Francis Hospital and Health Centers - Beech Grove Campus	Beech Grove	Indiana
United States	St. Joseph Cancer Center	Bellingham	Washington
United States	MeritCare Bemidji	Bemidji	Minnesota
United States	Billings Clinic - Downtown	Billings	Montana
United States	CCOP - Montana Cancer Consortium	Billings	Montana
United States	Hematology-Oncology Centers of the Northern Rockies - Billings	Billings	Montana
United States	St. Vincent Healthcare Cancer Care Services	Billings	Montana
United States	UAB Comprehensive Cancer Center	Birmingham	Alabama
United States	Medcenter One Hospital Cancer Care Center	Bismarck	North Dakota
United States	Mid Dakota Clinic, PC	Bismarck	North Dakota
United States	St. Alexius Medical Center Cancer Center	Bismarck	North Dakota
United States	Central Care Cancer Center at Carrie J. Babb Cancer Center	Bolivar	Missouri
United States	Boulder Community Hospital	Boulder	Colorado
United States	Wood County Oncology Center	Bowling Green	Ohio
United States	Bozeman Deaconess Cancer Center	Bozeman	Montana
United States	St. Joseph's Medical Center	Brainerd	Minnesota
United States	Skaggs Cancer Center at Skaggs Regional Medical Center	Branson	Missouri
United States	Olympic Hematology and Oncology	Bremerton	Washington
United States	Albert Einstein Cancer Center at Albert Einstein College of Medicine	Bronx	New York
United States	Highline Medical Center Cancer Center	Burien	Washington
United States	Fairview Ridges Hospital	Burnsville	Minnesota
United States	St. James Healthcare Cancer Care	Butte	Montana
United States	Aultman Cancer Center at Aultman Hospital	Canton	Ohio
United States	Southeast Cancer Center	Cape Girardeau	Missouri
United States	Rocky Mountain Oncology	Casper	Wyoming
United States	Cancer Center of Kansas, PA - Chanute	Chanute	Kansas
United States	West Virginia University Health Sciences Center - Charleston	Charleston	West Virginia
United States	Louis A. Weiss Memorial Hospital	Chicago	Illinois
United States	Case Comprehensive Cancer Center	Cleveland	Ohio
United States	Cleveland Clinic Cancer Center at Fairview Hospital	Cleveland	Ohio
United States	Cleveland Clinic Taussig Cancer Center	Cleveland	Ohio
United States	Medical Oncology and Hematology Associates - West Des Moines	Clive	Iowa
United States	Mercy Cancer Center - West Lakes	Clive	Iowa
United States	Penrose Cancer Center at Penrose Hospital	Colorado Springs	Colorado
United States	Mercy and Unity Cancer Center at Mercy Hospital	Coon Rapids	Minnesota
United States	Simmons Comprehensive Cancer Center at University of Texas Southwestern Medical Center - Dallas	Dallas	Texas
United States	CCOP - Dayton	Dayton	Ohio
United States	David L. Rike Cancer Center at Miami Valley Hospital	Dayton	Ohio
United States	Good Samaritan Hospital	Dayton	Ohio
United States	Grandview Hospital	Dayton	Ohio
United States	Samaritan North Cancer Care Center	Dayton	Ohio
United States	Decatur Memorial Hospital Cancer Care Institute	Decatur	Illinois
United States	CCOP - Colorado Cancer Research Program	Denver	Colorado
United States	Porter Adventist Hospital	Denver	Colorado
United States	Presbyterian - St. Luke's Medical Center	Denver	Colorado
United States	Rose Medical Center	Denver	Colorado
United States	St. Anthony Central Hospital	Denver	Colorado
United States	St. Joseph Hospital	Denver	Colorado
United States	CCOP - Iowa Oncology Research Association	Des Moines	Iowa
United States	John Stoddard Cancer Center at Iowa Lutheran Hospital	Des Moines	Iowa
United States	John Stoddard Cancer Center at Iowa Methodist Medical Center	Des Moines	Iowa
United States	Medical Oncology and Hematology Associates at John Stoddard Cancer Center	Des Moines	Iowa
United States	Medical Oncology and Hematology Associates at Mercy Cancer Center	Des Moines	Iowa
United States	Mercy Cancer Center at Mercy Medical Center - Des Moines	Des Moines	Iowa
United States	Barbara Ann Karmanos Cancer Institute	Detroit	Michigan
United States	Josephine Ford Cancer Center at Henry Ford Hospital	Detroit	Michigan
United States	Cancer Center of Kansas, PA - Dodge City	Dodge City	Kansas
United States	Doylestown Hospital Cancer Center	Doylestown	Pennsylvania
United States	CCOP - Duluth	Duluth	Minnesota
United States	Duluth Clinic Cancer Center - Duluth	Duluth	Minnesota
United States	Miller - Dwan Medical Center	Duluth	Minnesota
United States	Fairview Southdale Hospital	Edina	Minnesota
United States	Cancer Center of Kansas, PA - El Dorado	El Dorado	Kansas
United States	Elkhart Clinic, LLC	Elkhart	Indiana
United States	Elkhart General Hospital	Elkhart	Indiana
United States	Michiana Hematology-Oncology, PC - Elkhart	Elkhart	Indiana
United States	Union Hospital of Cecil County	Elkton	Maryland
United States	Elmhurst Memorial Hospital	Elmhurst	Illinois
United States	Community Cancer Center	Elyria	Ohio
United States	Hematology Oncology Center	Elyria	Ohio
United States	Swedish Medical Center	Englewood	Colorado
United States	Green Bay Oncology, Limited - Escanaba	Escanaba	Michigan
United States	CCOP - MeritCare Hospital	Fargo	North Dakota
United States	MeritCare Broadway	Fargo	North Dakota
United States	Roger Maris Cancer Center at MeritCare Hospital	Fargo	North Dakota
United States	Blanchard Valley Medical Associates	Findlay	Ohio
United States	Broward General Medical Center Cancer Center	Fort Lauderdale	Florida
United States	Cancer Center of Kansas - Fort Scott	Fort Scott	Kansas
United States	Hembree Mercy Cancer Center at St. Edward Mercy Medical Center	Fort Smith	Arkansas
United States	Middletown Regional Hospital	Franklin	Ohio
United States	Fredericksburg Oncology, Incorporated	Fredericksburg	Virginia
United States	Mercy and Unity Cancer Center at Unity Hospital	Fridley	Minnesota
United States	Charles R. Wood Cancer Center at Glens Falls Hospital	Glens Falls	New York
United States	Wayne Memorial Hospital, Incorporated	Goldsboro	North Carolina
United States	St. Mary's Regional Cancer Center at St. Mary's Hospital and Medical Center	Grand Junction	Colorado
United States	Big Sky Oncology	Great Falls	Montana
United States	Sletten Cancer Institute at Benefis Healthcare	Great Falls	Montana
United States	North Colorado Medical Center	Greeley	Colorado
United States	Green Bay Oncology, Limited at St. Mary's Hospital	Green Bay	Wisconsin
United States	Green Bay Oncology, Limited at St. Vincent Hospital Regional Cancer Center	Green Bay	Wisconsin
United States	St. Mary's Hospital Medical Center - Green Bay	Green Bay	Wisconsin
United States	St. Vincent Hospital Regional Cancer Center	Green Bay	Wisconsin
United States	Vince Lombardi Cancer Clinic - Green Bay at Aurora BayCare Medical Center	Green Bay	Wisconsin
United States	Wayne Hospital	Greenville	Ohio
United States	St. Peter's Hospital	Helena	Montana
United States	Penn State Hershey Cancer Institute at Milton S. Hershey Medical Center	Hershey	Pennsylvania
United States	Cancer Research Center of Hawaii	Honolulu	Hawaii
United States	Hawaii Medical Center - East	Honolulu	Hawaii
United States	Kapiolani Medical Center for Women and Children	Honolulu	Hawaii
United States	OnCare Hawaii, Incorporated - Kuakini	Honolulu	Hawaii
United States	OnCare Hawaii, Incorporated - Lusitana	Honolulu	Hawaii
United States	Queen's Cancer Institute at Queen's Medical Center	Honolulu	Hawaii
United States	Straub Clinic and Hospital, Incorporated	Honolulu	Hawaii
United States	Hutchinson Area Health Care	Hutchinson	Minnesota
United States	Cancer Center of Kansas-Independence	Independence	Kansas
United States	Cleveland Clinic Cancer Center	Independence	Ohio
United States	William N. Wishard Memorial Hospital	Indianapolis	Indiana
United States	Dickinson County Healthcare System	Iron Mountain	Michigan
United States	Swedish Medical Center - Issaquah Campus	Issaquah	Washington
United States	University of Mississippi Cancer Clinic	Jackson	Mississippi
United States	Goldschmidt Cancer Center	Jefferson City	Missouri
United States	Borgess Medical Center	Kalamazoo	Michigan
United States	Bronson Methodist Hospital	Kalamazoo	Michigan
United States	West Michigan Cancer Center	Kalamazoo	Michigan
United States	Kalispell Medical Oncology at KRMC	Kalispell	Montana
United States	Kalispell Regional Medical Center	Kalispell	Montana
United States	Good Samaritan Cancer Center at Good Samaritan Hospital	Kearney	Nebraska
United States	Columbia Basin Hematology	Kennewick	Washington
United States	Charles F. Kettering Memorial Hospital	Kettering	Ohio
United States	Cancer Center of Kansas, PA - Kingman	Kingman	Kansas
United States	Kinston Medical Specialists	Kinston	North Carolina
United States	Howard Community Hospital	Kokomo	Indiana
United States	Gundersen Lutheran Center for Cancer and Blood	La Crosse	Wisconsin
United States	La Grange Memorial Hospital	La Grange	Illinois
United States	Center for Cancer Therapy at LaPorte Hospital and Health Services	La Porte	Indiana
United States	Lancaster General Hospital	Lancaster	Pennsylvania
United States	St. Mary Regional Cancer Center	Langhorne	Pennsylvania
United States	University of New Mexico Cancer Center - South	Las Cruces	New Mexico
United States	CCOP - Nevada Cancer Research Foundation	Las Vegas	Nevada
United States	Lawrence Memorial Hospital	Lawrence	Kansas
United States	Tunnell Cancer Center at Beebe Medical Center	Lewes	Delaware
United States	Cancer Center of Kansas, PA - Liberal	Liberal	Kansas
United States	Kauai Medical Clinic	Lihue	Hawaii
United States	Lima Memorial Hospital	Lima	Ohio
United States	Cancer Resource Center - Lincoln	Lincoln	Nebraska
United States	Littleton Adventist Hospital	Littleton	Colorado
United States	Sky Ridge Medical Center	Lone Tree	Colorado
United States	Hope Cancer Care Center at Longmont United Hospital	Longmont	Colorado
United States	McKee Medical Center	Loveland	Colorado
United States	Holy Family Memorial Medical Center Cancer Care Center	Manitowoc	Wisconsin
United States	Immanuel St. Joseph's	Mankato	Minnesota
United States	HealthEast Cancer Care at St. John's Hospital	Maplewood	Minnesota
United States	Minnesota Oncology - Maplewood	Maplewood	Minnesota
United States	Bay Area Cancer Care Center at Bay Area Medical Center	Marinette	Wisconsin
United States	Vince Lombardi Cancer Clinic - Marinette	Marinette	Wisconsin
United States	Fox Chase Virtua Health Cancer Program at Virtua Memorial Hospital Marlton	Marlton	New Jersey
United States	Tibotec Therapeutics - Division of Ortho Biotech Products, LP	Marysville	California
United States	Northwest Ohio Oncology Center	Maumee	Ohio
United States	Hillcrest Cancer Center at Hillcrest Hospital	Mayfield Heights	Ohio
United States	Cancer Center of Kansas, PA - McPherson	McPherson	Kansas
United States	Mercy Cancer Center at Mercy Medical Center	Merced	California
United States	Middlesex Hospital Cancer Center	Middletown	Connecticut
United States	Hennepin County Medical Center - Minneapolis	Minneapolis	Minnesota
United States	Virginia Piper Cancer Institute at Abbott - Northwestern Hospital	Minneapolis	Minnesota
United States	Michiana Hematology-Oncology, PC - South Bend	Mishawaka	Indiana
United States	Saint Joseph Regional Medical Center	Mishawaka	Indiana
United States	Montana Cancer Center at St. Patrick Hospital and Health Sciences Center	Missoula	Montana
United States	Montana Cancer Specialists at Montana Cancer Center	Missoula	Montana
United States	University of South Alabama Mitchell Cancer Institute	Mobile	Alabama
United States	Community Cancer Center of Monroe	Monroe	Michigan
United States	Mercy Memorial Hospital - Monroe	Monroe	Michigan
United States	Skagit Valley Hospital Cancer Care Center	Mount Vernon	Washington
United States	Camino Medical Group - Treatment Center	Mountain View	California
United States	D.N. Greenwald Center	Mukwonago	Wisconsin
United States	Cancer Center at Ball Memorial Hospital	Muncie	Indiana
United States	Yale Cancer Center	New Haven	Connecticut
United States	New Ulm Medical Center	New Ulm	Minnesota
United States	Beth Israel Medical Center - Petrie Division	New York	New York
United States	St. Luke's - Roosevelt Hospital Center - St.Luke's Division	New York	New York
United States	CCOP - Christiana Care Health Services	Newark	Delaware
United States	Cancer Center of Kansas, PA - Newton	Newton	Kansas
United States	Cancer Care Associates - Norman	Norman	Oklahoma
United States	Regional Cancer Center at Oconomowoc Memorial Hospital	Oconomowoc	Wisconsin
United States	Green Bay Oncology, Limited - Oconto Falls	Oconto Falls	Wisconsin
United States	Cancer Care Associates - Mercy Campus	Oklahoma City	Oklahoma
United States	Alegant Health Cancer Center at Bergan Mercy Medical Center	Omaha	Nebraska
United States	CCOP - Missouri Valley Cancer Consortium	Omaha	Nebraska
United States	Creighton University Medical Center	Omaha	Nebraska
United States	Immanuel Medical Center	Omaha	Nebraska
United States	Lakeside Hospital	Omaha	Nebraska
United States	St. Joseph Hospital Regional Cancer Center - Orange	Orange	California
United States	St. Charles Mercy Hospital	Oregon	Ohio
United States	Toledo Clinic - Oregon	Oregon	Ohio
United States	Vince Lombardi Cancer Clinic - Oshkosh	Oshkosh	Wisconsin
United States	Palo Alto Medical Foundation	Palo Alto	California
United States	Parker Adventist Hospital	Parker	Colorado
United States	Parma Community General Hospital	Parma	Ohio
United States	Cancer Center of Kansas, PA - Parsons	Parsons	Kansas
United States	St. Joseph's Hospital and Medical Center	Paterson	New Jersey
United States	Kimmel Cancer Center at Thomas Jefferson University - Philadelphia	Philadelphia	Pennsylvania
United States	Valley Medical Oncology Consultants - Pleasanton	Pleasanton	California
United States	Michiana Hematology Oncology PC - Plymouth	Plymouth	Indiana
United States	Pottstown Memorial Regional Cancer Center	Pottstown	Pennsylvania
United States	Harrison Poulsbo Hematology and Onocology	Poulsbo	Washington
United States	Cancer Center of Kansas, PA - Pratt	Pratt	Kansas
United States	St. Mary - Corwin Regional Medical Center	Pueblo	Colorado
United States	Reid Hospital & Health Care Services	Richmond	Indiana
United States	West Suburban Center for Cancer Care	River Forest	Illinois
United States	Humphrey Cancer Center at North Memorial Outpatient Center	Robbinsdale	Minnesota
United States	Mayo Clinic Cancer Center	Rochester	Minnesota
United States	Mercy Clinic Cancer and Hematology - Rolla	Rolla	Missouri
United States	University of California Davis Cancer Center	Sacramento	California
United States	Lakeland Regional Cancer Care Center - St. Joseph	Saint Joseph	Michigan
United States	Lakeside Cancer Specialists, PLLC	Saint Joseph	Michigan
United States	Missouri Baptist Cancer Center	Saint Louis	Missouri
United States	CCOP - Metro-Minnesota	Saint Louis Park	Minnesota
United States	Park Nicollet Cancer Center	Saint Louis Park	Minnesota
United States	Regions Hospital Cancer Care Center	Saint Paul	Minnesota
United States	United Hospital	Saint Paul	Minnesota
United States	Cancer Center of Kansas, PA - Salina	Salina	Kansas
United States	North Coast Cancer Care, Incorporated	Sandusky	Ohio
United States	Nancy N. and J. C. Lewis Cancer and Research Pavilion at St. Joseph's/Candler	Savannah	Georgia
United States	Fred Hutchinson Cancer Research Center	Seattle	Washington
United States	Group Health Central Hospital	Seattle	Washington
United States	Harborview Medical Center	Seattle	Washington
United States	Minor and James Medical, PLLC	Seattle	Washington
United States	Polyclinic First Hill	Seattle	Washington
United States	Swedish Cancer Institute at Swedish Medical Center - First Hill Campus	Seattle	Washington
United States	University Cancer Center at University of Washington Medical Center	Seattle	Washington
United States	North Puget Oncology at United General Hospital	Sedro-Woolley	Washington
United States	St. Francis Cancer Center at St. Francis Medical Center	Shakopee	Minnesota
United States	St. Nicholas Hospital	Sheboygan	Wisconsin
United States	Vince Lombardi Cancer Clinic - Sheboygan	Sheboygan	Wisconsin
United States	Mercy Medical Center - Sioux City	Sioux City	Iowa
United States	Siouxland Hematology-Oncology Associates, LLP	Sioux City	Iowa
United States	St. Luke's Regional Medical Center	Sioux City	Iowa
United States	Sanford Cancer Center at Sanford USD Medical Center	Sioux Falls	South Dakota
United States	Somerset Medical Center	Somerville	New Jersey
United States	CCOP - Northern Indiana CR Consortium	South Bend	Indiana
United States	Memorial Hospital of South Bend	South Bend	Indiana
United States	Cancer Care Northwest - Spokane South	Spokane	Washington
United States	Evergreen Hematology and Oncology, PS	Spokane	Washington
United States	CCOP - Cancer Research for the Ozarks	Springfield	Missouri
United States	Hulston Cancer Center at Cox Medical Center South	Springfield	Missouri
United States	St. John's Regional Health Center	Springfield	Missouri
United States	Lakeview Hospital	Stillwater	Minnesota
United States	Cleveland Clinic Foundation - Strongsville	Strongsville	Ohio
United States	Green Bay Oncology, Limited - Sturgeon Bay	Sturgeon Bay	Wisconsin
United States	Aurora Medical Center	Summit	Wisconsin
United States	Flower Hospital Cancer Center	Sylvania	Ohio
United States	North Suburban Medical Center	Thornton	Colorado
United States	Mercy Hospital of Tiffin	Tiffin	Ohio
United States	CCOP - Toledo Community Hospital	Toledo	Ohio
United States	Medical University of Ohio Cancer Center	Toledo	Ohio
United States	St. Anne Mercy Hospital	Toledo	Ohio
United States	St. Vincent Mercy Medical Center	Toledo	Ohio
United States	Toledo Clinic, Incorporated - Main Clinic	Toledo	Ohio
United States	Toledo Hospital	Toledo	Ohio
United States	J. Phillip Citta Regional Cancer Center at Community Medical Center	Toms River	New Jersey
United States	UVMC Cancer Care Center at Upper Valley Medical Center	Troy	Ohio
United States	Tahoe Forest Cancer Center	Truckee	California
United States	Vince Lombardi Cancer Clinic - Two Rivers	Two Rivers	Wisconsin
United States	Cancer Institute of New Jersey at Cooper - Voorhees	Voorhees	New Jersey
United States	Fox Chase Virtua Health Cancer Program at Virtua West Jersey	Voorhees	New Jersey
United States	Ridgeview Medical Center	Waconia	Minnesota
United States	Maui Memorial Medical Center	Wailuku	Hawaii
United States	Pacific Cancer Institute - Maui	Wailuku	Hawaii
United States	Lombardi Comprehensive Cancer Center at Georgetown University Medical Center	Washington	District of Columbia
United States	Washington Cancer Institute at Washington Hospital Center	Washington	District of Columbia
United States	Waukesha Memorial Hospital Regional Cancer Center	Waukesha	Wisconsin
United States	University of Wisconcin Cancer Center at Aspirus Wausau Hospital	Wausau	Wisconsin
United States	Fulton County Health Center	Wauseon	Ohio
United States	Cancer Center of Kansas, PA - Wellington	Wellington	Kansas
United States	Wenatchee Valley Medical Center	Wenatchee	Washington
United States	Methodist West Hospital	West Des Moines	Iowa
United States	Michiana Hematology Oncology PC - La Porte	Westville	Indiana
United States	Exempla Lutheran Medical Center	Wheat Ridge	Colorado
United States	Associates in Womens Health, PA - North Review	Wichita	Kansas
United States	Cancer Center of Kansas, PA - Medical Arts Tower	Wichita	Kansas
United States	Cancer Center of Kansas, PA - Wichita	Wichita	Kansas
United States	CCOP - Wichita	Wichita	Kansas
United States	Via Christi Cancer Center at Via Christi Regional Medical Center	Wichita	Kansas
United States	Willmar Cancer Center at Rice Memorial Hospital	Willmar	Minnesota
United States	Cancer Center of Kansas, PA - Winfield	Winfield	Kansas
United States	Riverview UW Cancer Center at Riverview Hospital	Wisconsin Rapids	Wisconsin
United States	Minnesota Oncology - Woodbury	Woodbury	Minnesota
United States	Cleveland Clinic - Wooster	Wooster	Ohio
United States	United States Air Force Medical Center - Wright-Patterson	Wright-Patterson Air Force Base	Ohio
United States	Ruth G. McMillan Cancer Center at Greene Memorial Hospital	Xenia	Ohio

Sponsors (2)

Lead Sponsor	Collaborator
ECOG-ACRIN Cancer Research Group	National Cancer Institute (NCI)

Countries where clinical trial is conducted

United States,  Canada,  Peru, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Progression-free Survival by CYP2D6 Status in 2 Categories	Progression-free survival is defined as the time from registration to progression or death, whichever occurs first. Response Evaluation Criteria in Solid Tumors (RECIST) guideline (version 1.1) was used to evaluate progression. Progression is defined as appearance of one or more new lesions or unequivocal progression of existing non-target lesions or at least a 20% increase in the sum of the diameters of target lesions, taking as reference the smallest sum on study (this includes the baseline sum if that is the smallest on study). In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of at least 5 mm.	Assessed every 3 months for 2 years, then every 6 months up to 5 years
Secondary	Progression-free Survival by CYP2D6 Status in 3 Categories	Progression-free survival is defined as the time from registration to progression or death, whichever occurs first. Response Evaluation Criteria in Solid Tumors (RECIST) guideline (version 1.1) was used to evaluate progression. Progression is defined as appearance of one or more new lesions or unequivocal progression of existing non-target lesions or at least a 20% increase in the sum of the diameters of target lesions, taking as reference the smallest sum on study (this includes the baseline sum if that is the smallest on study). In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of at least 5 mm.	Assessed every 3 months for 2 years, then every 6 months up to 5 years
Secondary	Proportion of Patients Progression-free at 6 Months	Response Evaluation Criteria in Solid Tumors (RECIST) guideline (version 1.1) was used to evaluate progression. Progression is defined as appearance of one or more new lesions or unequivocal progression of existing non-target lesions or at least a 20% increase in the sum of the diameters of target lesions, taking as reference the smallest sum on study (this includes the baseline sum if that is the smallest on study). In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of at least 5 mm.	Assessed every 3 months for 6 months
Secondary	Proportion of Patients With Response	Response Evaluation Criteria in Solid Tumors (RECIST) guideline (version 1.1) was used to evaluate response. Either complete response (CR) or partial response (PR) is considered as response. CR is defined as disappearance of all lesions. PR is defined as at least a 30% decrease in the sum of the diameters of target lesions, taking as reference the baseline sum diameters.	Assessed every 3 months for 2 years, then every 6 months up to 5 years
Secondary	Endoxifen Concentration by Response	Endoxifen (ng/ml) was assessed at cycle 3.; Response Evaluation Criteria in Solid Tumors (RECIST) guideline (version 1.1) was used to evaluate response. Either complete response (CR) or partial response (PR) is considered as response. CR is defined as disappearance of all lesions. PR is defined as at least a 30% decrease in the sum of the diameters of target lesions, taking as reference the baseline sum diameters.	Endoxifen was assessed at cycle 3; response was assessed every 3 months for 2 years, then every 6 months up to 5 years
Secondary	Progression-free Survival From 3 Months Post Registration	This is a landmark progression-free survival analysis at 3 months post registration. Only patients who were progression-free and alive at 3 months were included.; Progression-free survival in this analysis is defined as the time from 3 months post registration to progression or death, whichever occurs first. Response Evaluation Criteria in Solid Tumors (RECIST) guideline (version 1.1) was used to evaluate progression. Progression is defined as appearance of one or more new lesions or unequivocal progression of existing non-target lesions or at least a 20% increase in the sum of the diameters of target lesions, taking as reference the smallest sum on study (this includes the baseline sum if that is the smallest on study). In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of at least 5 mm.	Assessed every 3 months for 2 years, then every 6 months up to 5 years