A Study of Patritumab Deruxtecan in Pediatric Participants With Relapsed or Refractory Solid Tumors (MK-9999-01C/LIGHTBEAM-U01)

Childrens Hospital Los Angeles ( Site 3006), Los Angeles, California, United States

Children's Hospital Colorado-Center for Cancer and Blood Disorders ( Site 3016), Aurora, Colorado, United States

Yale New Haven Hospital ( Site 3012), New Haven, Connecticut, United States

Johns Hopkins All Children's Hospital ( Site 3025), St. Petersburg, Florida, United States

University of Iowa Health Care Holden Comprehensive Cancer Center ( Site 3017), Iowa City, Iowa, United States

Dana-Farber Cancer Institute ( Site 3013), Boston, Massachusetts, United States

Corewell Health ( Site 3001), Grand Rapids, Michigan, United States

Children's Mercy Hospital ( Site 3024), Kansas City, Missouri, United States

Rutgers Cancer Institute of New Jersey ( Site 3008), New Brunswick, New Jersey, United States

Memorial Sloan Kettering Cancer Center ( Site 3010), New York, New York, United States

New York Medical College ( Site 3023), Valhalla, New York, United States

Sanford Fargo Medical Center-Roger Maris Cancer Center ( Site 3003), Fargo, North Dakota, United States

Oregon Health and Science University ( Site 3004), Portland, Oregon, United States

Children's Hospital of Philadelphia (CHOP) ( Site 3021), Philadelphia, Pennsylvania, United States

Sanford Children's Hospital ( Site 3015), Sioux Falls, South Dakota, United States

University of Texas-MD Anderson Cancer Center ( Site 3007), Houston, Texas, United States

Intermountain - Primary Children's Hospital ( Site 3014), Salt Lake City, Utah, United States

Sydney Children's Hospital-Kids Cancer Centre ( Site 3997), Sydney, New South Wales, Australia

Queensland Children's Hospital ( Site 3996), Brisbane, Queensland, Australia

UZ Gent ( Site 3428), Ghent, Oost-Vlaanderen, Belgium

Hospital de Clinicas de Porto Alegre ( Site 3265), Porto Alegre, Rio Grande do Sul, Brazil

Fundação Pio XII - Hospital de Câncer de Barretos ( Site 3264), Barretos, São Paulo, Brazil

Fundação Faculdade Regional de Medicina de São José do Rio Preto ( Site 3267), São José do Rio Preto, São Paulo, Brazil

The Hospital for Sick Children ( Site 3225), Toronto, Ontario, Canada

Hospital Carlos Van Buren ( Site 3880), Valparaíso, Valparaiso, Chile

Hospital Pablo Tobon Uribe ( Site 3923), Medellín, Antioquia, Colombia

Clinica de la Costa S.A.S. ( Site 3924), Barranquilla, Atlántico, Colombia

IMAT S.A.S ( Site 3921), Montería, Departamento de Córdoba, Colombia

Detska nemocnice FN Brno ( Site 3388), Brno, Brno-mesto, Czechia

Fakultni nemocnice v Motole-Klinika detske hematologie a onkologie ( Site 3387), Prague, Praha 5, Czechia

Rigshospitalet-Department of paediatrics and adolescent medicine, Section of Paed haem-onc ( Site 3467), Copenhagen, Capital Region, Denmark

Bordeaux University Hospital - Pellegrin ( Site 3105), Bordeaux, Aquitaine, France

Assistance Publique Hôpitaux de Marseille - Hôpital de la Timone ( Site 3102), Marseille, Bouches-du-Rhone, France

Centre Hospitalier Universitaire de Nantes - Hôpital Femme-Enfant-Adolescent Chu De Nantes ( Site 3104), Nantes, Loire-Atlantique, France

Centre Leon-Berard ( Site 3100), Lyon, Rhone, France

Institut Curie ( Site 3101), Paris, Île-de-France Region, France

Universitätsklinikum Münster - Albert Schweitzer Campus ( Site 3141), Münster, North Rhine-Westphalia, Germany

Aghia Sophia Children's Hospital-First Department of Pediatrics, National and Kapodistrian Universi ( Site 3797), Athens, Attica, Greece

Semmelweis University ( Site 3838), Budapest, Pest County, Hungary

Rambam Health Care Campus ( Site 3674), Haifa, Israel

Sheba Medical Center ( Site 3675), Ramat Gan, Israel

Fondazione IRCCS Istituto Nazionale dei Tumori ( Site 3552), Milan, Italy

Ospedale Pediatrico Bambino Gesù IRCCS ( Site 3553), Roma, Italy

Ospedale Infantile Regina Margherita ( Site 3551), Torino, Italy

Prinses Maxima Centrum voor Kinderoncologie ( Site 3510), Utrecht, Netherlands

Narodny ustav detskych chorob ( Site 3592), Bratislava, Bratislava Region, Slovakia

Seoul National University Hospital-Pediatrics ( Site 3972), Seoul, South Korea

Asan Medical Center-Pediatrics - Pedicatric Oncology ( Site 3973), Seoul, South Korea

Hospital Sant Joan de Déu ( Site 3717), Esplugues de Llobregat, Barcelona, Spain

Hospital Universitari Vall d''Hebron ( Site 3716), Barcelona, Spain

Hospital Infantil Universitario Nino Jesus ( Site 3715), Madrid, Spain

Sahlgrenska Universitetssjukhuset ( Site 3634), Gothenburg, Västra Götaland County, Sweden

National Taiwan University Hospital ( Site 3983), Taiwan, Taipei, Taiwan

Hacettepe Universitesi Tip Fakultesi Hastanesi ( Site 3961), Ankara, Turkey (Türkiye)

Ankara Bilkent Şehir Hastanesi. ( Site 3962), Ankara, Turkey (Türkiye)

Ege Universitesi Hastanesi ( Site 3963), Izmir, Turkey (Türkiye)

Birmingham Children's Hospital ( Site 3349), Birmingham, England, United Kingdom

Royal Victoria Infirmary ( Site 3348), Newcastle upon Tyne, England, United Kingdom

University Hospital of Wales ( Site 3346), Cardiff, United Kingdom

Royal Marsden Hospital ( Site 3347), Sutton, United Kingdom