Imfinzi BTC Japan PMS_Japan Post-Marketing Surveillance (PMS) Study - CEI/SCEI

This investigation will be conducted to investigate onset of adverse drug reactions in patients with curatively unresectable biliary tract cancer who receive IMFINZI Intravenous Infusion 120mg, 500mg in combination with gemcitabine hydrochloride and cisplatin under actual use in the post-marketing setting. The investigation will be conducted as one of the additional pharmacovigilance activities in the Japan Risk Management Plan of IMFINZI in compliance with the Ministerial Ordinance on Good Post-marketing Study Practice (GPSP Ordinance) and for the purpose of application for reexamination under Article 14-4 of the Act on Securing Quality, Efficacy and Safety of Products Including Pharmaceuticals and Medical Devices. Among the safety specifications defined in the Japan Risk Management Plan of IMFINZI, the following items are set as the safety specifications for this study. Interstitial lung disease, Colitis/Severe diarrhoea, Hepatic function disorder/Hepatis/Cholangitis Sclerosing, Endocrine disorders (Dysfunction thyroid, Dysfunction adrenal, Pituitary dysfunction), Type 1 diabetes mellitus, Renal disorder (interstitial nephritis, etc), Myositis, Myocarditis, Myasthenia gravis, Immune thrombocytopenic purpura, Encephalitis, Severe skin disorder, Nerve disorder (including guillain-barre syndrome), Infusion reaction, Pancreatitis, Gastrointestinal perforation, Rhabdomyolysis, Meningitis, Febrile neutropenia during combination treatment with chemotherapy, Embryo-fetal toxicity and Use in patients with a history of organ transplant (including haematopoietic stem cell transplant).