NCT02107703

Brief Summary

The main purpose of this study is to compare progression-free survival for women with hormone receptor positive (HR+), human epidermal growth factor receptor (HER2) negative advanced breast cancer receiving either abemaciclib + fulvestrant or fulvestrant alone. Participants will be randomized to abemaciclib or placebo in a 2:1 ratio. The study will last about 9 months for each participant. For the endocrine naïve cohort, all participants will received abemaciclib + fulvestrant.

Trial Health

87
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Strong global presence with extensive site network
Enrollment
669

participants targeted

Target at P75+ for phase_3

Timeline
19mo left

Started Jul 2014

Longer than P75 for phase_3

Geographic Reach
20 countries

146 active sites

Status
active not recruiting

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Progress89%
Jul 2014Dec 2027

First Submitted

Initial submission to the registry

April 4, 2014

Completed
4 days until next milestone

First Posted

Study publicly available on registry

April 8, 2014

Completed
4 months until next milestone

Study Start

First participant enrolled

July 22, 2014

Completed
2.6 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

February 14, 2017

Completed
1.1 years until next milestone

Results Posted

Study results publicly available

March 13, 2018

Completed
9.7 years until next milestone

Study Completion

Last participant's last visit for all outcomes

December 1, 2027

Expected
Last Updated

October 21, 2025

Status Verified

October 1, 2025

Enrollment Period

2.6 years

First QC Date

April 4, 2014

Results QC Date

February 12, 2018

Last Update Submit

October 17, 2025

Conditions

Keywords

MONARCH 2

Outcome Measures

Primary Outcomes (1)

  • Progression-Free Survival (PFS)

    PFS defined as the time from the date of randomization to the first evidence of disease progression as defined by response evaluation criteria in solid tumors (RECIST) v1.1 or death from any cause. Progressive Disease (PD) was at least a 20% increase in the sum of the diameters of target lesions, with reference being the smallest sum on study and an absolute increase of at least 5 mm, or unequivocal progression of non-target lesions, or 1 or more new lesions. If a participant does not have a complete baseline disease assessment, then the PFS time was censored at the date of randomization, regardless of whether or not objectively determined disease progression or death has been observed for the participant. If a participant was not known to have died or have objective progression as of the data inclusion cutoff date for the analysis, the PFS time was censored at the last adequate tumor assessment date.

    From Date of Randomization until Disease Progression or Death Due to Any Cause (Up To 31 Months)

Secondary Outcomes (10)

  • Overall Survival (OS)

    From Date of Randomization until Death Due to Any Cause (Up To 72 Months)

  • Percentage of Participants Achieving Complete Response (CR) or Partial Response (PR) (Objective Response Rate [ORR])

    From Date of First Dose until Disease Progression or Death Due to Any Cause (Up To 31 Months)

  • Duration of Response (DOR)

    From Date of CR, PR until Disease Progression or Death Due to Any Cause (Up To 31 Months)

  • Percentage of Participants Achieving CR, PR or Stable Disease (SD) (Disease Control Rate [DCR])

    From Date of First Dose until Disease Progression or Death Due to Any Cause (Up To 31 Months)

  • Percentage of Participants With CR, PR or SD With a Duration of At Least 6 Months (Clinical Benefit Rate [CBR])

    From Date of First Dose until Disease Progression or Death Due to Any Cause (Up To 31 Months)

  • +5 more secondary outcomes

Study Arms (2)

Abemaciclib + Fulvestrant

EXPERIMENTAL

Abemaciclib 150 milligram (mg) administered orally every 12 hours on Days 1 to 28 of a 28-day cycle in combination with fulvestrant 500mg administered intramuscularly (IM) on Days 1 and 15 of Cycle 1, then on Day 1 of Cycle 2 and beyond. Participants received treatment until discontinuation were met.

Drug: AbemaciclibDrug: Fulvestrant

Placebo + Fulvestrant

PLACEBO COMPARATOR

Placebo administered orally every 12 hours on Days 1 to 28 of a 28-day cycle in combination with fulvestrant 500mg administered IM on Days 1 and 15 of Cycle 1, then on Day 1 of Cycle 2 and beyond. Participants received treatment until discontinuation were met.

Drug: FulvestrantDrug: Placebo

Interventions

Administered Orally

Also known as: LY2835219
Abemaciclib + Fulvestrant

Administered IM

Abemaciclib + FulvestrantPlacebo + Fulvestrant

Administered Orally

Placebo + Fulvestrant

Eligibility Criteria

Age18 Years+
Sexfemale
Healthy VolunteersNo
Age GroupsAdult (18-64), Older Adult (65+)

You may qualify if:

  • Have a diagnosis of HR+, HER2- breast cancer
  • Have locally advanced disease not amenable to curative treatment by surgery or metastatic disease. In addition, participants must fulfill 1 of the following criteria:
  • relapsed with radiologic evidence of progression while receiving neoadjuvant or adjuvant endocrine therapy, with no subsequent endocrine therapy received following progression
  • relapsed with radiologic evidence of progression within 1 year from completion of adjuvant endocrine therapy, with no subsequent endocrine therapy received following progression
  • relapsed with radiologic evidence of progression more than 1 year from completion of adjuvant endocrine therapy and then subsequently relapsed with radiologic evidence of progression after receiving treatment with either an antiestrogen or an aromatase inhibitor as first-line endocrine therapy for metastatic disease. Participants may not have received more than 1 line of endocrine therapy or any prior chemotherapy for metastatic disease
  • presented de novo with metastatic disease and then relapsed with radiologic evidence of progression after receiving treatment with either an antiestrogen or an aromatase inhibitor as first line endocrine therapy for metastatic disease. Participants may not have received more than 1 line of endocrine therapy or any prior chemotherapy for metastatic disease
  • for the endocrine naïve cohort: Must not have received prior endocrine therapy in current or prior disease setting
  • Have postmenopausal status due to either surgical/natural menopause or ovarian suppression (initiated at least 28 days prior to Day 1 of Cycle 1) with a gonadotropin-releasing hormone (GnRH) agonist such as goserelin
  • Have a negative serum pregnancy test at baseline (within 14 days prior to randomization) and agree to use medically approved precautions to prevent pregnancy during the study and for 12 weeks following the last dose of abemaciclib if postmenopausal status is due to ovarian suppression with a GnRH agonist
  • Have either measurable disease or nonmeasurable bone only disease
  • Have a performance status ≤1 on the Eastern Cooperative Oncology Group (ECOG) scale
  • Have discontinued previous therapies for cancer (including specifically, aromatase inhibitors, anti-estrogens, chemotherapy, radiotherapy, and immunotherapy) for at least 21 days for myelosuppressive agents or 14 days for nonmyelosuppressive agents prior to receiving study drug, and recovered from the acute effects of therapy (until the toxicity resolves to either baseline or at least Grade 1) except for residual alopecia or peripheral neuropathy

You may not qualify if:

  • Are currently receiving an investigational drug in a clinical trial or participating in any other type of medical research judged not to be scientifically or medically compatible with this study
  • Have visceral crisis, lymphangitic spread, or leptomeningeal carcinomatosis visceral crisis is not the mere presence of visceral metastases but implies severe organ dysfunction as assessed by symptoms and signs, laboratory studies, and rapid progression of the disease
  • Have clinical evidence or history of central nervous system metastasis
  • Have received prior treatment with chemotherapy (except for neoadjuvant/ adjuvant chemotherapy), fulvestrant, everolimus, or any CDK4/6 inhibitor. For the endocrine naïve cohort: In addition, have received treatment with any prior endocrine therapy
  • Have received treatment with a drug that has not received regulatory approval for any indication within 14 or 21 days prior to randomization of study drug for a nonmyelosuppressive or myelosuppressive agent, respectively
  • Have received recent (within 28 days prior to randomization) yellow fever vaccination
  • Have had major surgery within 14 days prior to randomization of study drug to allow for post-operative healing of the surgical wound and site(s)
  • Have a personal history within the last 12 months of any of the following conditions: syncope of cardiovascular etiology, ventricular tachycardia, ventricular fibrillation, or sudden cardiac arrest
  • Have inflammatory breast cancer or a history of any other cancer (except nonmelanoma skin cancer or carcinoma in-situ of the cervix), unless in complete remission with no therapy for a minimum of 3 years
  • Have received an autologous or allogeneic stem-cell transplant
  • Have active bacterial or fungal infection, or detectable viral infection
  • Have initiated bisphosphonates or approved Receptor activator of nuclear factor kappa-B (RANK) ligand targeted agents \<7 days prior to randomization

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (146)

St. Bernards Medical Center

Jonesboro, Arkansas, 72401, United States

Location

Highlands Oncology Group

Springdale, Arkansas, 72762, United States

Location

University of California - San Diego

La Jolla, California, 92037-0845, United States

Location

Kaiser Permanente

Riverside, California, 92505, United States

Location

Univ of California San Francisco

San Francisco, California, 94115, United States

Location

Stanford University Clinic

Stanford, California, 94305, United States

Location

Palm Beach Cancer Institue

Atlantis, Florida, 33462, United States

Location

Holy Cross Hospital

Fort Lauderdale, Florida, 33308, United States

Location

Florida Cancer Specialists - South

Fort Myers, Florida, 33901, United States

Location

Palm Beach Cancer Institue

Palm Beach Gardens, Florida, 33410, United States

Location

Florida Cancer Specialists - North

St. Petersburg, Florida, 33705, United States

Location

Moffitt Cancer Center, Richard M. Shulze Family Foundation Outpatient Center

Tampa, Florida, 33612, United States

Location

Palm Beach Cancer Institue

Wellington, Florida, 33414, United States

Location

Palm Beach Cancer Institue

West Palm Beach, Florida, 33401, United States

Location

University Cancer & Blood Center, LLC

Athens, Georgia, 30607, United States

Location

Harbin Clinic

Rome, Georgia, 30165, United States

Location

Quincy Medical Group

Quincy, Illinois, 62301, United States

Location

Pharmasite Research, Inc.

Baltimore, Maryland, 21208, United States

Location

Dana Farber Cancer Institute

Boston, Massachusetts, 02215, United States

Location

Breslin Cancer Center

Lansing, Michigan, 48910, United States

Location

Minnesota Oncology/Hematology PA

Minneapolis, Minnesota, 55404, United States

Location

Washington University Medical School

City of Saint Peters, Missouri, 63376, United States

Location

Washington University Medical School

Creve Coeur, Missouri, 63141, United States

Location

Freeman Cancer Institute

Joplin, Missouri, 64804, United States

Location

St Lukes Hospital

Kansas City, Missouri, 64111, United States

Location

Washington University Medical School

St Louis, Missouri, 63110, United States

Location

Washington University Medical School

St Louis, Missouri, 63129, United States

Location

Billings Clinic

Billings, Montana, 59101, United States

Location

Dartmouth-Hitchcock Medical Center

Lebanon, New Hampshire, 03756-0001, United States

Location

Icahn School of Medicine at Mount Sinai

New York, New York, 10029, United States

Location

Columbia University Medical Center

New York, New York, 10032, United States

Location

Rochester General Hospital

Rochester, New York, 14621, United States

Location

Rochester General Hospital

Rochester, New York, 14625, United States

Location

Novant Health, Oncology Research Institute

Winston-Salem, North Carolina, 27103, United States

Location

Oklahoma Cancer Specialists & Research Institute, LLC

Tulsa, Oklahoma, 74146, United States

Location

Sanford Research/USD

Sioux Falls, South Dakota, 57104, United States

Location

The Boston Baskin Cancer Group

Memphis, Tennessee, 38120, United States

Location

SMO Sarah Cannon Research Inst.

Nashville, Tennessee, 37203, United States

Location

Baylor College of Medicine

Houston, Texas, 77030, United States

Location

Oncology Consultants P.A.

Houston, Texas, 77030, United States

Location

Utah Cancer Specialists

Salt Lake City, Utah, 84106, United States

Location

Kadlec Clinic Hematology and Oncology

Kennewick, Washington, 99336, United States

Location

St Mary Regional Cancer Center

Walla Walla, Washington, 99362, United States

Location

Icon Cancer Centre South Brisbane

South Brisbane, Queensland, 4101, Australia

Location

Gold Coast University Hospital

Southport, Queensland, 4215, Australia

Location

Ashford Cancer Centre Research

Kurralta Park, South Australia, 5037, Australia

Location

Monash Cancer Centre

East Bentleigh, Victoria, 3165, Australia

Location

St. John of God Subiaco Hospital

Subiaco, Western Australia, 6008, Australia

Location

Antwerp University Hospital

Edegem, Antwerpen, 2650, Belgium

Location

UZ Brussel

Brussels, Bruxelles-Capitale, Région de, 1090, Belgium

Location

UZ Leuven

Leuven, Vlaams-Brabant, 3000, Belgium

Location

Centre Hospitalier Universitaire de Liège - Domaine Universitaire du Sart Tilman

Liège, 4000, Belgium

Location

Tom Baker Cancer Center

Calgary, Alberta, T2N 4N2, Canada

Location

London Regional Cancer Program

London, Ontario, N6A 5W9, Canada

Location

Humber River Hospital

Toronto, Ontario, M3M 0B2, Canada

Location

Unity Health Toronto, St. Michael's Hospital

Toronto, Ontario, M5B 1W8, Canada

Location

Herlev and Gentofte Hospital

Copenhagen, Capital Region, 2730, Denmark

Location

Aalborg Universitets hospital

Aalborg, 9000, Denmark

Location

Roskilde Sygehus

Roskilde, 4000, Denmark

Location

Tampereen yliopistollinen sairaala

Tampere, Pirkanmaa, 33520, Finland

Location

Helsinki University Hospital - Comprehensive Cancer Center (HYKS - Syöpäkeskus)

Helsinki, Uusimaa, 00029, Finland

Location

Turun Yliopistollinen Keskussairaala

Turku, 20520, Finland

Location

CHU Besançon

Besançon, Doubs, 25000, France

Location

Centre Jean Perrin - Centre Régional de Lutte contre le Cancer d'Auvergne

Clermont-Ferrand, Puy-de-Dôme, 63011, France

Location

Polyclinique De Blois

La Chaussée-Saint-Victor, 41260, France

Location

Clinique Victor Hugo - Centre Jean Bernard

Le Mans, 72000, France

Location

Klinikum Ludwigsburg

Ludwigsburg, Baden-Wurttemberg, 71640, Germany

Location

Universitaetsklinikum Tuebingen

Tübingen, Baden-Wurttemberg, 72076, Germany

Location

Gemeinschaftspraxis hop-augsburg

Augsburg, Bavaria, 86150, Germany

Location

Klinikum der Ludwig-Maximilians-Universitaet Muenchen

München, Bavaria, 80336, Germany

Location

Facharztzentrum Eppendorf

Hamburg, 20249, Germany

Location

University Hospital of Patras

Pátrai, Achaḯa, 26504, Greece

Location

Agios Savvas Regional Cancer Hospital

Athens, Attikí, 11522, Greece

Location

University General Hospital of Heraklion

Heraklion, Krítí, 71110, Greece

Location

Chania General Hospital 'Agios Georgios'

Chania, 73300, Greece

Location

Azienda Ospedaliero Universitaria S.Anna

Cona, Emilia-Romagna, 44124, Italy

Location

Istituto Nazionale Tumori Regina Elena

Rome, Roma, 00144, Italy

Location

Ospedale Bellaria - Azienda USL di Bologna

Bologna, 40139, Italy

Location

Istituto Oncologico Veneto IRCCS

Padua, 35128, Italy

Location

Aichi Cancer Center Hospital

Nagoya, Aichi-ken, 464-8681, Japan

Location

Chiba cancer center

Chiba, Chiba, 260-8717, Japan

Location

National Cancer Center Hospital East

Kashiwa, Chiba, 277-8577, Japan

Location

National Hospital Organization Shikoku Cancer Center

Matsuyama, Ehime, 791-0280, Japan

Location

Kurume General Hospital

Kurume, Fukuoka, 830-0013, Japan

Location

National Hospital Organization Hokkaido Cancer Center

Sapporo, Hokkaido, 003-0804, Japan

Location

Hyogo College of Medicine

Nishinomiya, Hyōgo, 663-8501, Japan

Location

St. Marianna University School of Medicine Hospital

Kawasaki, Kanagawa, 216-8511, Japan

Location

Niigata Cancer Center Hospital

Niigata, Niigata, 951-8566, Japan

Location

Saitama Prefectural Cancer Center

Ina-machi, Saitama, 362-0806, Japan

Location

Jichi Medical University Hospital

Shimotsuke, Tochigi, 329- 0498, Japan

Location

Tokyo Met Cancer & Infectious Diseases Center Komagome Hp

Bunkyo-ku, Tokyo, 113-8677, Japan

Location

National Cancer Center Hospital

Chuo-ku, Tokyo, 104-0045, Japan

Location

Japanese Foundation for Cancer Research

Koto, Tokyo, 135-8550, Japan

Location

National Hospital Organization Kyushu Cancer Center

Fukuoka, 811-1395, Japan

Location

Sagara Hospital

Kagoshima, 892-0833, Japan

Location

Kyoto University Hospital

Kyoto, 606-8507, Japan

Location

National Hospital Organization Osaka Medical Center

Osaka, 540-0006, Japan

Location

Osaka International Cancer Institute

Osaka, 541-8567, Japan

Location

Hospital Angeles

Tijuana, Estado de Baja California, 22010, Mexico

Location

Preparaciones Oncológicas S.C.

León, Guanajuato, 37178, Mexico

Location

Centro Oncológico Internacional (COI)

Guadalajara, Jalisco, 45647, Mexico

Location

Grupo Medico Camino Sc

Mexico City, Mexico City, 03310, Mexico

Location

Instituto Nacional de Cancerologia

Mexico City, Mexico City, 14070, Mexico

Location

OCA Hospital

Monterrey, Nuevo León, 64000, Mexico

Location

Tecnologico de Monterrey

Monterrey, Nuevo León, 64710, Mexico

Location

Uniwersyteckie Centrum Kliniczne

Gdansk, Pomeranian Voivodeship, 80-214, Poland

Location

Bialostockie Centrum Onkologii, Oddzial Onkologii Klinicznej

Bialystok, 15-027, Poland

Location

Centrum Terapii Wspolczesnej J. M. Jasnorzewska Spolka Komandytowo-Akcyjna

Lodz, Łódź Voivodeship, Poland

Location

Puerto Rico Hematology/Oncology Group

Bayamón, PR, 00959, Puerto Rico

Location

S.C. MedisProf SRL

Cluj-Napoca, Cluj, 400058, Romania

Location

Centrul de Oncologie "Sfântul Nectarie"

Craiova, Dolj, 200347, Romania

Location

Ianuli Med Consult SRL

Bucharest, 010976, Romania

Location

Arkhangelsk Clinical Oncological Dispensary

Arkhangelsk, Arkhangelskaya oblast, 163045, Russia

Location

Regional Budgetary Healthcare Institution 'Ivanovo Regional Oncology Dispensary'

Ivanovo, Ivanovo Oblast, 153040, Russia

Location

Fed State Budgetary Inst "N.N. Blokhin Med Center of Oncology" MHRF

Moscow, Moscow, 115478, Russia

Location

Kursk Regional Oncology Dispensary

Kursk, Russian Federation, 305035, Russia

Location

N.N.Petrov Research Institute of Oncology

Saint Petersburg, Sankt-Peterburg, 197758, Russia

Location

Saint-Petersburg City Clinical Oncology Dispensary

Saint Petersburg, Sankt-Peterburg, 198255, Russia

Location

Chungbuk National University Hospital

Cheongju-si, Chungcheongbuk-do [Chungbuk], 28644, South Korea

Location

Inha University Hospital

Incheon, Incheon-gwangyeoksi [Incheon], 22332, South Korea

Location

Gachon University Gil Medical Center

Namdong-gu, Incheon-gwangyeoksi [Incheon], 21565, South Korea

Location

Seoul National University Bundang Hospital

Seongnam, Kyǒnggi-do, 13620, South Korea

Location

Seoul National University Hospital

Seoul, Seoul-teukbyeolsi [Seoul], 3080, South Korea

Location

Severance Hospital, Yonsei University Health System

Seoul, Seoul-teukbyeolsi [Seoul], 3722, South Korea

Location

Asan Medical Center

Seoul, Seoul-teukbyeolsi [Seoul], 5505, South Korea

Location

Samsung Medical Center

Seoul, Seoul-teukbyeolsi [Seoul], 6351, South Korea

Location

The Catholic Univ. of Korea Seoul St. Mary's Hospital

Seoul, Seoul-teukbyeolsi [Seoul], 6591, South Korea

Location

Ulsan University Hospital

Ulsan, Ulsan-Kwangyǒkshi, 44033, South Korea

Location

Hospital General Universitario de Elche

Elche, Alicante, 03202, Spain

Location

Hospital Universitari Vall d'Hebron

Barcelona, Barcelona [Barcelona], 08035, Spain

Location

Hospital Universitario Arnau de Vilanova de Lleida

Lleida, Lleida [Lérida], 25198, Spain

Location

Hospital Universitario 12 de Octubre

Madrid, Madrid, Comunidad de, 28041, Spain

Location

Hospital General Universitario Morales Meseguer

Murcia, Murcia, Región de, 30008, Spain

Location

Hospital Quirónsalud Valencia

Valencia, València, 46010, Spain

Location

Hospital Clinico San Carlos

Madrid, 28040, Spain

Location

Universitätsspital Basel

Basel, Canton of Basel-City, 4031, Switzerland

Location

Spital Thun

Thun, Canton of Bern, 3600, Switzerland

Location

HUG-Hôpitaux Universitaires de Genève

Geneva, 1211, Switzerland

Location

Chang Gung Memorial Hospital at Kaohsiung

Kaohsiung Niao Sung Dist, Kaohsiung, 83301, Taiwan

Location

Kaohsiung Medical University Hospital

Kaohsiung City, 80756, Taiwan

Location

Kaohsiung Veterans General Hospital

Kaohsiung City, 81362, Taiwan

Location

China Medical University Hospital

Taichung, 40447, Taiwan

Location

Taichung Veterans General Hospital

Taichung, 407, Taiwan

Location

National Taiwan University Hospital

Taipei, 10002, Taiwan

Location

Taipei Veterans General Hospital

Taipei, 11217, Taiwan

Location

Chang Gung Medical Foundation-Linkou Branch

Taoyuan District, 333, Taiwan

Location

Related Publications (5)

  • Neven P, Rugo HS, Tolaney SM, Iwata H, Toi M, Goetz MP, Kaufman PA, Lu Y, Haddad N, Hurt KC, Sledge GW Jr. Abemaciclib plus fulvestrant in hormone receptor-positive, human epidermal growth factor receptor 2-negative advanced breast cancer in premenopausal women: subgroup analysis from the MONARCH 2 trial. Breast Cancer Res. 2021 Aug 23;23(1):87. doi: 10.1186/s13058-021-01463-2.

  • Inoue K, Masuda N, Iwata H, Takahashi M, Ito Y, Miyoshi Y, Nakayama T, Mukai H, van der Walt JS, Mori J, Sakaguchi S, Kawaguchi T, Tanizawa Y, Llombart-Cussac A, Sledge GW Jr, Toi M. Japanese subpopulation analysis of MONARCH 2: phase 3 study of abemaciclib plus fulvestrant for treatment of hormone receptor-positive, human epidermal growth factor receptor 2-negative breast cancer that progressed on endocrine therapy. Breast Cancer. 2021 Sep;28(5):1038-1050. doi: 10.1007/s12282-021-01239-8. Epub 2021 Apr 1.

  • Goetz MP, Okera M, Wildiers H, Campone M, Grischke EM, Manso L, Andre VAM, Chouaki N, San Antonio B, Toi M, Sledge GW Jr. Safety and efficacy of abemaciclib plus endocrine therapy in older patients with hormone receptor-positive/human epidermal growth factor receptor 2-negative advanced breast cancer: an age-specific subgroup analysis of MONARCH 2 and 3 trials. Breast Cancer Res Treat. 2021 Apr;186(2):417-428. doi: 10.1007/s10549-020-06029-y. Epub 2021 Jan 3.

  • Sledge GW Jr, Toi M, Neven P, Sohn J, Inoue K, Pivot X, Burdaeva O, Okera M, Masuda N, Kaufman PA, Koh H, Grischke EM, Conte P, Lu Y, Barriga S, Hurt K, Frenzel M, Johnston S, Llombart-Cussac A. The Effect of Abemaciclib Plus Fulvestrant on Overall Survival in Hormone Receptor-Positive, ERBB2-Negative Breast Cancer That Progressed on Endocrine Therapy-MONARCH 2: A Randomized Clinical Trial. JAMA Oncol. 2020 Jan 1;6(1):116-124. doi: 10.1001/jamaoncol.2019.4782.

  • Sledge GW Jr, Toi M, Neven P, Sohn J, Inoue K, Pivot X, Burdaeva O, Okera M, Masuda N, Kaufman PA, Koh H, Grischke EM, Frenzel M, Lin Y, Barriga S, Smith IC, Bourayou N, Llombart-Cussac A. MONARCH 2: Abemaciclib in Combination With Fulvestrant in Women With HR+/HER2- Advanced Breast Cancer Who Had Progressed While Receiving Endocrine Therapy. J Clin Oncol. 2017 Sep 1;35(25):2875-2884. doi: 10.1200/JCO.2017.73.7585. Epub 2017 Jun 3.

MeSH Terms

Conditions

Breast Neoplasms

Interventions

abemaciclibFulvestrant

Condition Hierarchy (Ancestors)

Neoplasms by SiteNeoplasmsBreast DiseasesSkin DiseasesSkin and Connective Tissue Diseases

Intervention Hierarchy (Ancestors)

EstradiolEstrenesEstranesSteroidsFused-Ring CompoundsPolycyclic CompoundsEstradiol CongenersGonadal Steroid HormonesGonadal HormonesHormonesHormones, Hormone Substitutes, and Hormone Antagonists

Results Point of Contact

Title
Chief Medical Officer
Organization
Eli Lilly and Company

Study Officials

  • Call 1-877-CTLILLY (1-877-285-4559) or 1-317-615-4559 Mon - Fri 9 AM - 5 PM Eastern time (UTC/GMT - 5 hours, EST)

    Eli Lilly and Company

    STUDY DIRECTOR

Publication Agreements

PI is Sponsor Employee
No
Restriction Type
GT60
Restrictive Agreement
Yes

Study Design

Study Type
interventional
Phase
phase 3
Allocation
RANDOMIZED
Masking
DOUBLE
Who Masked
PARTICIPANT, INVESTIGATOR
Purpose
TREATMENT
Intervention Model
PARALLEL
Sponsor Type
INDUSTRY
Responsible Party
SPONSOR
Expanded Access
Yes

Study Record Dates

First Submitted

April 4, 2014

First Posted

April 8, 2014

Study Start

July 22, 2014

Primary Completion

February 14, 2017

Study Completion (Estimated)

December 1, 2027

Last Updated

October 21, 2025

Results First Posted

March 13, 2018

Record last verified: 2025-10

Data Sharing

IPD Sharing
Will share

Anonymized individual patient level data will be provided in a secure access environment upon approval of a research proposal and a signed data sharing agreement.

Shared Documents
STUDY PROTOCOL, SAP, CSR
Time Frame
Data are available 6 months after the primary publication and approval of the indication studied in the US and European Union (EU), whichever is later. Data will be indefinitely available for requesting.
Access Criteria
A research proposal must be approved by an independent review panel and researchers must sign a data sharing agreement.
More information

Locations