Whole-Brain Radiation Therapy or Stereotactic Radiosurgery With or Without Lapatinib Ditosylate in Treating Patients With Brain Metastasis From HER2-Positive Breast Cancer

Mount Sinai Hospital, New York

Montefiore Medical Center - Moses Campus, The Bronx

New York-Presbyterian/Brooklyn Methodist Hospital, Brooklyn

Hematology Oncology Associates of Central New York-East Syracuse, East Syracuse

Roswell Park Cancer Institute, Buffalo

Highland Hospital, Rochester

University of Rochester, Rochester

Lehigh Valley Hospital - Muhlenberg, Bethlehem

Lehigh Valley Hospital-Cedar Crest, Allentown

Pocono Medical Center, East Stroudsburg

Jefferson Abington Hospital, Abington

Thomas Jefferson University Hospital, Philadelphia

Reading Hospital, West Reading

Christiana Gynecologic Oncology LLC, Newark

Delaware Clinical and Laboratory Physicians PA, Newark

Helen F Graham Cancer Center, Newark

Medical Oncology Hematology Consultants PA, Newark

Christiana Care Health System-Christiana Hospital, Newark

Christiana Care Health System-Wilmington Hospital, Wilmington

Beebe Medical Center, Lewes

Beebe Health Campus, Rehoboth Beach

TidalHealth Nanticoke / Allen Cancer Center, Seaford

Greater Baltimore Medical Center, Baltimore

Fredericksburg Oncology Inc, Fredericksburg

Virginia Commonwealth University/Massey Cancer Center, Richmond

Wheeling Hospital/Schiffler Cancer Center, Wheeling

UNC Lineberger Comprehensive Cancer Center, Chapel Hill

Iredell Memorial Hospital, Statesville

AdventHealth Hendersonville, Hendersonville

Spartanburg Medical Center, Spartanburg

Gibbs Cancer Center-Gaffney, Gaffney

Medical University of South Carolina, Charleston

AnMed Health Cancer Center, Anderson

Gibbs Cancer Center-Pelham, Greer

Northside Hospital-Forsyth, Cumming

Piedmont Fayette Hospital, Fayetteville

Piedmont Hospital, Atlanta

Northside Hospital, Atlanta

Northeast Georgia Medical Center-Gainesville, Gainesville

Lewis Cancer and Research Pavilion at Saint Joseph's/Candler, Savannah

University of Miami Miller School of Medicine-Sylvester Cancer Center, Miami

Miami Cancer Institute, Miami

UM Sylvester Comprehensive Cancer Center at Deerfield Beach, Deerfield Beach

University of Alabama at Birmingham Cancer Center, Birmingham

The Kirklin Clinic at Acton Road, Birmingham

University of South Alabama Mitchell Cancer Institute, Mobile

University of Mississippi Medical Center, Jackson

Singing River Hospital, Pascagoula

Norton Hospital Pavilion and Medical Campus, Louisville

Norton Suburban Hospital and Medical Campus, Louisville

Keimyung University-Dongsan Medical Center, Dalseo-gu

Ohio State University Comprehensive Cancer Center, Columbus

Toledo Clinic Cancer Centers-Bowling Green, Bowling Green

Toledo Clinic Cancer Centers-Maumee, Maumee

Toledo Radiation Oncology at Northwest Ohio Onocolgy Center, Maumee

ProMedica Flower Hospital, Sylvania

Fulton County Health Center, Wauseon

Saint Vincent Mercy Medical Center, Toledo

University of Toledo, Toledo

Saint Charles Hospital, Oregon

Toledo Clinic Cancer Centers-Oregon, Oregon

Toledo Community Hospital Oncology Program CCOP, Toledo

Mercy Health - Saint Anne Hospital, Toledo

Toledo Clinic Cancer Centers-Toledo, Toledo

Geauga Hospital, Chardon

Mercy Cancer Center-Elyria, Elyria

UH Seidman Cancer Center at Lake Health Mentor Campus, Mentor

Case Western Reserve University, Cleveland

Cleveland Clinic Cancer Center/Fairview Hospital, Cleveland

Cleveland Clinic Cancer Center Beachwood, Beachwood

UHHS-Chagrin Highlands Medical Center, Beachwood

Hillcrest Hospital Cancer Center, Mayfield Heights

University Hospitals Parma Medical Center, Parma

UH Seidman Cancer Center at Southwest General Hospital, Middleburg Heights

Cleveland Clinic Cancer Center Independence, Independence

Cleveland Clinic Cancer Center Strongsville, Strongsville

UHHS-Westlake Medical Center, Westlake

Cleveland Clinic Foundation, Cleveland

Summa Health System - Barberton Campus, Barberton

Summa Health Medina Medical Center, Medina

University Hospitals Portage Medical Center, Ravenna

Summa Health System - Akron Campus, Akron

Cleveland Clinic Akron General, Akron

UH Seidman Cancer Center at Salem Regional Medical Center, Salem

Radiation Oncology Center, Alliance

Cancer Treatment Center, Wooster

Cleveland Clinic Wooster Family Health and Surgery Center, Wooster

Cleveland Clinic Mercy Hospital, Canton

North Coast Cancer Care, Sandusky

Mercy Hospital of Tiffin, Tiffin

Cleveland Clinic Cancer Center Mansfield, Mansfield

Dayton Physicians LLC-Atrium, Franklin

Oncology Hematology Care Inc-Kenwood, Cincinnati

Dayton Physicians LLC-Wayne, Greenville

Wayne Hospital, Greenville

Dayton Physicians LLC-Upper Valley, Troy

Upper Valley Medical Center, Troy

Good Samaritan Hospital - Dayton, Dayton

Miami Valley Hospital, Dayton

Dayton Physician LLC-Miami Valley Hospital North, Dayton

Miami Valley Hospital North, Dayton

Kettering Medical Center, Kettering

Dayton Physicians LLC-Miami Valley South, Centerville

Miami Valley Hospital South, Centerville

Springfield Regional Cancer Center, Springfield

Springfield Regional Medical Center, Springfield

Lima Memorial Hospital, Lima

Armes Family Cancer Center, Findlay

Blanchard Valley Hospital, Findlay

Orion Cancer Care, Findlay

IU Health La Porte Hospital, La Porte

Michiana Hematology Oncology PC-Westville, Westville

Michiana Hematology Oncology PC-Elkhart, Elkhart

Elkhart General Hospital, Elkhart

Memorial Regional Cancer Center Day Road, Mishawaka

Michiana Hematology Oncology PC-Mishawaka, Mishawaka

Saint Joseph Regional Medical Center-Mishawaka, Mishawaka

Michiana Hematology Oncology PC-Plymouth, Plymouth

Memorial Hospital of South Bend, South Bend

Michiana Hematology Oncology PC-South Bend, South Bend

South Bend Clinic, South Bend

Radiation Oncology Associates PC, Fort Wayne

Parkview Hospital Randallia, Fort Wayne

Parkview Regional Medical Center, Fort Wayne

Community Howard Regional Health, Kokomo

Reid Health, Richmond

Henry Ford Macomb Hospital-Clinton Township, Clinton Township

Lake Huron Medical Center, Port Huron

Saint John Macomb-Oakland Hospital, Warren

Saint Joseph Mercy Hospital, Ann Arbor

University of Michigan Comprehensive Cancer Center, Ann Arbor

Saint Joseph Mercy Brighton, Brighton

Saint Joseph Mercy Chelsea, Chelsea

Beaumont Hospital - Dearborn, Dearborn

Trinity Health Saint Mary Mercy Livonia Hospital, Livonia

Mercy Memorial Hospital, Monroe

Toledo Clinic Cancer Centers-Monroe, Monroe

Henry Ford Cancer Institute-Downriver, Brownstown

Saint Joseph Mercy Canton, Canton

Henry Ford Hospital, Detroit

Ascension Saint John Hospital, Detroit

Henry Ford West Bloomfield Hospital, West Bloomfield

21st Century Oncology-Pontiac, Pontiac

Saint Joseph Mercy Oakland, Pontiac

Genesys Hurley Cancer Institute, Flint

Hurley Medical Center, Flint

Ascension Saint Mary's Hospital, Saginaw

Sparrow Hospital, Lansing

Bronson Methodist Hospital, Kalamazoo

West Michigan Cancer Center, Kalamazoo

Bronson Battle Creek, Battle Creek

Borgess Medical Center, Kalamazoo

Lakeland Medical Center Saint Joseph, Saint Joseph

Marie Yeager Cancer Center, Saint Joseph

Lakeland Hospital Niles, Niles

Allegiance Health, Jackson

Bixby Medical Center, Adrian

Hickman Cancer Center, Adrian

Spectrum Health Big Rapids Hospital, Big Rapids

Mercy Health Mercy Campus, Muskegon

Mercy Health Saint Mary's, Grand Rapids

Spectrum Health at Butterworth Campus, Grand Rapids

Metro Health Hospital, Wyoming

Munson Medical Center, Traverse City

Green Bay Oncology - Iron Mountain, Iron Mountain

Green Bay Oncology - Escanaba, Escanaba

Saint Luke's Hospital, Cedar Rapids

UW Cancer Center Johnson Creek, Johnson Creek

Ascension Columbia Saint Mary's Hospital Ozaukee, Mequon

Ascension Columbia Saint Mary's Hospital - Milwaukee, Milwaukee

Medical College of Wisconsin, Milwaukee

University of Wisconsin Carbone Cancer Center, Madison

Cancer Center of Western Wisconsin, New Richmond

Bay Area Medical Center, Marinette

Saint Vincent Hospital Cancer Center at Oconto Falls, Oconto Falls

Holy Family Memorial Hospital, Manitowoc

Green Bay Oncology - Sturgeon Bay, Sturgeon Bay

Saint Vincent Hospital Cancer Center Green Bay, Green Bay

Green Bay Oncology Limited at Saint Mary's Hospital, Green Bay

Saint Vincent Hospital Cancer Center at Saint Mary's, Green Bay

Regions Hospital, Saint Paul

United Hospital, Saint Paul

Minnesota Oncology Hematology PA-Maplewood, Maplewood

Saint John's Hospital - Healtheast, Maplewood

Fairview Ridges Hospital, Burnsville

Fairview Clinics and Surgery Center Maple Grove, Maple Grove

Ridgeview Medical Center, Waconia

Abbott-Northwestern Hospital, Minneapolis

Hennepin County Medical Center, Minneapolis

Park Nicollet Clinic - Saint Louis Park, Saint Louis Park

North Memorial Medical Health Center, Robbinsdale

Unity Hospital, Fridley

Mercy Hospital, Coon Rapids

Fairview Southdale Hospital, Edina

Health Partners Inc, Minneapolis

Rice Memorial Hospital, Willmar

Rush - Copley Medical Center, Aurora

John H Stroger Jr Hospital of Cook County, Chicago

UChicago Medicine Comprehensive Cancer Center - Saint Joseph Hospital, Chicago

Carle Cancer Center, Urbana

Carle on Vermilion, Danville

Carle Physician Group-Mattoon/Charleston, Mattoon

Carle Physician Group-Effingham, Effingham

Good Samaritan Regional Health Center, Mount Vernon

Saint Louis Cancer and Breast Institute-South City, St Louis

Washington University School of Medicine, St Louis

Siteman Cancer Center-South County, St Louis

Siteman Cancer Center at West County Hospital, Creve Coeur

Mercy Hospital Saint Louis, St Louis

Saint Louis-Cape Girardeau CCOP, St Louis

Siteman Cancer Center at Saint Peters Hospital, City of Saint Peters

Saint Francis Medical Center, Cape Girardeau

Centerpoint Medical Center LLC, Independence

Liberty Radiation Oncology Center, Liberty

Saint Luke's East - Lee's Summit, Lee's Summit

Saint Luke's Hospital of Kansas City, Kansas City

North Kansas City Hospital, Kansas City

Heartland Hematology and Oncology Associates Incorporated, Kansas City

Research Medical Center, Kansas City

Heartland Regional Medical Center, Saint Joseph

Saint Joseph Oncology Inc, Saint Joseph

Mercy Hospital Joplin, Joplin

Delbert Day Cancer Institute at PCRMC, Rolla

Mercy Clinic-Rolla-Cancer and Hematology, Rolla

Central Care Cancer Center - Bolivar, Bolivar

Mercy Hospital Springfield, Springfield

CoxHealth South Hospital, Springfield

Menorah Medical Center, Overland Park

Saint Luke's South Hospital, Overland Park

Kansas Institute of Medicine Cancer and Blood Center, Lenexa

Minimally Invasive Surgery Hospital, Lenexa

Central Care Cancer Center - Great Bend, Great Bend

Central Care Cancer Center - Garden City, Garden City

Ochsner Medical Center Jefferson, New Orleans

Natalie Warren Bryant Cancer Center at Saint Francis, Tulsa

Warren Clinic Oncology-Tulsa, Tulsa

University of Texas Health Science Center at San Antonio, San Antonio

Covenant Medical Center-Lakeside, Lubbock

Saint Alphonsus Cancer Care Center-Caldwell, Caldwell

Idaho Urologic Institute-Meridian, Meridian

Saint Alphonsus Cancer Care Center-Boise, Boise

Saint Joseph's Hospital and Medical Center, Phoenix

Banner University Medical Center - Tucson, Tucson

University of New Mexico Cancer Center, Albuquerque

Memorial Medical Center - Las Cruces, Las Cruces

Renown Regional Medical Center, Reno

Mills-Peninsula Medical Center, Burlingame

Palo Alto Medical Foundation-Camino Division, Mountain View

Palo Alto Medical Foundation-Gynecologic Oncology, Mountain View

Palo Alto Medical Foundation-Sunnyvale, Sunnyvale

California Pacific Medical Center-Pacific Campus, San Francisco

Palo Alto Medical Foundation Health Care, Palo Alto

Stanford Cancer Institute Palo Alto, Palo Alto

Epic Care-Dublin, Dublin

Sutter Solano Medical Center/Cancer Center, Vallejo

Epic Care Cyberknife Center, Walnut Creek

Bay Area Breast Surgeons Inc, Emeryville

Epic Care Partners in Cancer Care, Emeryville

Alta Bates Summit Medical Center - Summit Campus, Oakland

Bay Area Tumor Institute, Oakland

Alta Bates Summit Medical Center-Herrick Campus, Berkeley

Sutter Cancer Research Consortium, Novato

Palo Alto Medical Foundation-Santa Cruz, Santa Cruz

Memorial Medical Center, Modesto

Sutter Pacific Medical Foundation, Santa Rosa

Sutter Auburn Faith Hospital, Auburn

Sutter Cancer Centers Radiation Oncology Services-Auburn, Auburn

Mercy San Juan Medical Center, Carmichael

Sutter Davis Hospital, Davis

Sutter Cancer Centers Radiation Oncology Services-Roseville, Roseville

Sutter Roseville Medical Center, Roseville

Sutter Cancer Centers Radiation Oncology Services-Cameron Park, Cameron Park

Sutter Cancer Centers Radiation Oncology Services-Vacaville, Vacaville

Sutter Medical Center Sacramento, Sacramento

Mercy General Hospital Radiation Oncology Center, Sacramento

Legacy Mount Hood Medical Center, Gresham

Legacy Good Samaritan Hospital and Medical Center, Portland

Legacy Salmon Creek Hospital, Vancouver

Contra Costa Regional Medical Center, Martinez

Smilow Cancer Hospital Care Center at Saint Francis, Hartford

The Hospital of Central Connecticut, New Britain

Elkhart Clinic, Elkhart

Boston Medical Center, Boston

Elliot Hospital, Manchester

Saint Barnabas Medical Center, Livingston

Virtua Memorial, Mount Holly

Virtua Voorhees, Voorhees Township

Atrium Medical Center-Middletown Regional Hospital, Franklin

Central Vermont Medical Center/National Life Cancer Treatment, Berlin Corners

University of Vermont Medical Center, Burlington

University of Vermont and State Agricultural College, Burlington

Green Bay Oncology at Saint Vincent Hospital, Green Bay

Saint Vincent Hospital Cancer Center at Sturgeon Bay, Sturgeon Bay

Juravinski Cancer Centre at Hamilton Health Sciences, Hamilton

Jewish General Hospital, Montreal

National Cancer Center-Korea, Goyang-si

Chonnam National University Hwasun Hospital, Hwasun-gun

Samsung Medical Center, Seoul

Seoul National University Bundang Hospital, Seongnam

Gangnam Severance Hospital, Seoul

Seoul National University Hospital, Seoul

Yonsei University Health System-Severance Hospital, Seoul