A Study to Investigate Tislelizumab Administered as Subcutaneous Injection Versus Intravenous Infusion Plus Chemotherapy in Patients With Unresectable or Metastatic Gastric or Gastroesophageal Junction Adenocarcinoma — Stella
Phase 3 — Large-scale testing across thousands of people, comparing the new treatment against current standard treatments.
(82 sites) United States
Ironwood Cancer and Research Centers, Chandler, Arizona Cancer and Blood Specialty Clinic, Los Alamitos, California Bioresearch Partners Holding Hialeah Hospital, Hialeah, Florida Orlando Health Ufhealth Cancer Center, Orlando, Florida Northwestern University, Chicago, Illinois Hope and Healing Cancer Services, Hinsdale, Illinois University of Kansas Medical Center Research Institute, Kansas City, Kansas New England Cancer Specialists, Westbrook, Maine St Louis Cancer Care, Llp, Bridgeton, Missouri Nebraska Hematology Oncology, Lincoln, Nebraska Comprehensive Cancer Centers of Nevada, Las Vegas, Nevada Hunterdon Hematology Oncology, Flemington, New Jersey Summit Medical Group, Florham Park, New Jersey Oregon Oncology Specialists, Salem, Oregon Md Anderson Cancer Center, Houston, Texas Scott and White Memorial Hospital, Temple, Texas Northwest Medical Specialties, Tacoma, Washington Austria
Krankenhaus Der Barmherzigen Schwestern Linz, Linz Medical Univeristy Vienna, Vienna Brazil
Hospital de Amor Barretos, Barretos Hospital Brasilia, Brasília Hospital Universiario Onofre Lopes, Natal Hospital Sao Lucas Da Pucrs, Porto Alegre Inca Instituto Nacional de Cancer, Rio de Janeiro Fundacao Faculdade Regional de Medicina de Sao Jose Do Rio Preto, São José do Rio Preto Icesp Instituto Do Cancer Do Estado de Sao Paulo Octavio Frias de Oliveira, São Paulo Instituto Dor de Pesquisa E Ensino Sao Paulo, São Paulo Hospital Santa Rita de Cassia Afecc, Vitória China
The Second Hospital of Anhui Medical University, Hefei, Anhui Cancer Hospital Chinese Academy of Medical Sciences, Beijing, Beijing Municipality The First Affiliated Hospital of Xiamen University, Xiamen, Fujian Anyang Tumor Hospital, Anyang, Henan Henan Cancer Hospital, Zhengzhou, Henan The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Nanjing Drum Tower Hospital,the Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu Ganzhou Peoples Hospital Ganzhou Hospital Affiliated to Nanchang University, Ganzhou, Jiangxi The First Hospital of China Medical University, Shenyang, Liaoning Shandong Cancer Hospital, Jinan, Shandong Affiliated Hospital of Jining Medical University, Jining, Shandong Changzhi Peoples Hospital, Changzhi, Shanxi Czechia
Masarykuv Onkologicky Ustav, Brno Fakultni Nemocnice Hradec Kralove, Hradec Králové Fakultni Nemocnice Olomouc, Olomouc Vseobecna Fakultni Nemocnice V Praze, Prague France
Institut Sainte Catherine, Avignon Chru de Brest Hopital Cavale Blanche, Brest Hopital Claude Huriez Chu Lille, Lille Italy
Irccs Azienda Ospedaliera Metropolitana (Aom), Genova Fondazione Irccs Istituto Nazionale Dei Tumori, Milan Aou Pisana, Stabilimento Di Santa Chiara, Pisa Istituto Clinico Humanitas, Rozzano Japan
Matsuyama Red Cross Hospital, Matsuyama, Ehime Japan Community Health Care Organization Kyushu Hospital, Kitakyushu, Fukuoka Nho Hokkaido Cancer Center, Sapporo, Hokkaido Osaka Rosai Hospital, SakaiShi, Osaka Osaka Medical and Pharmaceutical University Hospital, Takatsukishi, Osaka Saitama Cancer Center, Kitaadachigun, Saitama Hamamatsu University School of Medicine, University Hospital, Hamamatsushi, Shizuoka Tochigi Cancer Center, Utsunomiya, Tochigi Institute of Science Tokyo Hospital, Bunkyoku, Tokyo Tokyo Metropolitan Bokutoh Hospital, SumidaKu, Tokyo Poland
Pratia McM Krakow, Krakow Narodowy Instytut Onkologii Im Marii Sklodowskiej Curie Hematology Unit, Warsaw Puerto Rico
Pan American Oncology Trials, Llc, Rio Piedras South Korea
Seoul National University Bundang Hospital, Seongnam-si, Gyeonggi-do Kyungpook National University Chilgok Hospital, BukGu, Gyeongsangbukdo Samsung Medical Center, GangnamGu, Seoul Teugbyeolsi Severance Hospital Yonsei University Health System, SeodaemunGu, Seoul Teugbyeolsi Seoul National University Hospital, Seoul, Seoul Teugbyeolsi Asan Medical Center, SongpaGu, Seoul Teugbyeolsi Spain
Hospital Clinic de Barcelona, Barcelona Hospital Universitario de Navarra, Pamplona Hospital Clinico Universitario de Valencia, Valencia Hospital Universitario Miguel Servet, Zaragoza United Kingdom
Cambridge University Hospitals Nhs Foundation Trust, Cambridge Ninewells Hospital and Medical School, Dundee Clatterbridge Cancer Centre, Metropolitan Borough of Wirral
Key details Enrollment target
~351 participants
Primary completion
October 2027
Age range
18 Years and older
Last updated April 2026
Interested in joining? Shanxi Provincial Cancer Hospital, Taiyuan, Shanxi
Tianjin Medical University Cancer Institute and Hospital, Tianjin, Tianjin Municipality The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang