A Phase 3 interventional study of Zanidatamab and Cisplatin in Biliary Tract Cancer, sponsored by Jazz Pharmaceuticals. Recruiting at 185 sites in 25 countries. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-10-28.
Sponsored by Jazz Pharmaceuticals · Phase 3, Interventional, and Treatment
The purpose of this study is to evaluate the efficacy and safety of Zanidatamab plus CisGem (Cisplatin and Gemcitabine) with or without the addition of a programmed death protein 1/ligand-1 (PD-1/L1) inhibitor (physician's choice of either Durvalumab or Pembrolizumab, where approved under local regulations) as first line of treatment for participants with human epidermal growth factor receptor 2 (HER2)-positive biliary tract cancer.
519 studies on the registry are indexed under Biliary Tract Neoplasms; 199 are open to participants now.
This study's planned enrollment of 286 is above the median of 58 across 427 interventional studies indexed under Biliary Tract Neoplasms.
Browse Biliary Tract Neoplasms studies →Jazz Pharmaceuticals is the lead sponsor of 173 studies on the registry; 18 are open to participants now.
Of its 42 completed or terminated interventional studies of FDA-regulated products, 32 (76%) have results posted.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
The diagnosis was confirmed by looking at a sample under a microscope: tissue from a biopsy or surgery (histology), or cells from a fluid or needle sample (cytology).
Your pathology report is the document that shows this.
Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.
PD-1, PD-L1 and CTLA-4 are proteins that act as brakes on the immune system. Checkpoint inhibitors, such as pembrolizumab or nivolumab, block them so the immune system can attack a cancer.
PD-L1 can also be measured in a tumour sample. Some scores count stained tumour cells only (TPS); others also count certain immune cells (CPS). The study names the score and the minimum it uses.
HER2 is a protein, made from the ERBB2 gene, that drives the growth of some cancers. A study may look for a level of the protein, extra copies of the gene, or a particular change in it.
In breast cancer, protein tests are read as HER2-positive, HER2-low or HER2-negative; other cancers use their own rules. Check which test result the study requires.
A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.
Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.
The standard rules for measuring tumours on CT or MRI scans, to tell whether a cancer is shrinking, stable or growing during treatment.
“Measurable disease per RECIST 1.1” usually means at least one tumour 10 mm or more at its longest on a CT scan, or a lymph node 15 mm or more across its short axis.
A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.
Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
Cancer deposits in the brain from a cancer that started elsewhere in the body (CNS metastases include the spinal cord).
Studies differ: some leave out any brain metastases, some accept ones treated and stable for some weeks. Check what this study allows.
A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.
Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.
A drug or device being studied in a clinical trial.
It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.
Histologically or cytologically confirmed
The diagnosis was confirmed by looking at a sample under a microscope: tissue from a biopsy or surgery (histology), or cells from a fluid or needle sample (cytology).
Your pathology report is the document that shows this.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Metastases
Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
PD-1, PD-L1 and checkpoint inhibitors
PD-1, PD-L1 and CTLA-4 are proteins that act as brakes on the immune system. Checkpoint inhibitors, such as pembrolizumab or nivolumab, block them so the immune system can attack a cancer.
PD-L1 can also be measured in a tumour sample. Some scores count stained tumour cells only (TPS); others also count certain immune cells (CPS). The study names the score and the minimum it uses.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
HER2
HER2 is a protein, made from the ERBB2 gene, that drives the growth of some cancers. A study may look for a level of the protein, extra copies of the gene, or a particular change in it.
In breast cancer, protein tests are read as HER2-positive, HER2-low or HER2-negative; other cancers use their own rules. Check which test result the study requires.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Biopsy and archival tissue
A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.
Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
RECIST
The standard rules for measuring tumours on CT or MRI scans, to tell whether a cancer is shrinking, stable or growing during treatment.
“Measurable disease per RECIST 1.1” usually means at least one tumour 10 mm or more at its longest on a CT scan, or a lymph node 15 mm or more across its short axis.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ECOG performance status
A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.
Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Childbearing potential
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraception
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Corticosteroids (steroids)
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Brain metastases
Cancer deposits in the brain from a cancer that started elsewhere in the body (CNS metastases include the spinal cord).
Studies differ: some leave out any brain metastases, some accept ones treated and stable for some weeks. Check what this study allows.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Autoimmune disease
A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.
Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Investigational drug or device
A drug or device being studied in a clinical trial.
It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Zanidatamab plus standard of care treatment of CisGem with or without a PD-1/L1 inhibitor. PD-1/L1 inhibitor will be physician's choice of either Durvalumab or Pembrolizumab, where approved under local regulations.
Drug: Zanidatamab · Drug: Cisplatin · Drug: Gemcitabine · Drug: Pembrolizumab · Drug: Durvalumab
Standard of care treatment of CisGem with or without a PD-1/L1 inhibitor. PD-1/L1 inhibitor will be physician's choice of either Durvalumab or Pembrolizumab, where approved under local regulations.
Drug: Cisplatin · Drug: Gemcitabine · Drug: Pembrolizumab · Drug: Durvalumab
Administered intravenously (IV)
Also known as: ZW25, JZP598, ZIIHERA®
Administered intravenously (IV)
Administered intravenously (IV)
Administered intravenously (IV)
Administered intravenously (IV)
Progression Free Survival (PFS) in participants with Immunohistochemistry (IHC) 3+ tumors
PFS is defined as the time from the date of randomization to the date of documented disease progression, or death from any cause.
Time frame: Up to 52 months
Overall survival (OS) in participants with IHC 3+ tumors
OS is defined as the time from randomization to death, due to any cause.
Time frame: Up to 68 months
Progression Free Survival for all participants
PFS is defined as the time from the date of randomization to the date of documented disease progression, or death from any cause.
Time frame: Up to 68 months
OS for all participants
OS is defined as the time from randomization to death, due to any cause.
Time frame: Up to 68 months
Number of participants achieving Confirmed objective response rate (cORR)
Confirmed objective response rate is defined as achieving a confirmed best overall response of Complete Response (CR) or Partial Response (PR)
Time frame: Up to 68 months
Duration of response (DOR)
Duration of response is defined as the time from the first objective response (CR or PR) to documented Progressive Disease (PD) or death, from any cause.
Time frame: Up to 68 months
Number of Patients reporting Treatment-Emergent Adverse Events (TEAE)
Time frame: Up to 68 months
Maximum serum concentration of Zanidatamab
Time frame: Up to 68 months
Number of participants who develop Anti-drug antibodies (ADAs) to Zanidatamab
Time frame: Up to 68 months
Time to definitive deterioration (TDD) for participants with IHC 3+ tumors in patient-reported Physical Functioning (PF) domain score as measured by the EORTC QLQ-C30
TDD is defined as the time from randomization to the first confirmed clinical meaningful deterioration or death. European Organisation for Research and Treatment of Cancer (EORTC) Quality of Life Questionnaire - Core 30 (QLQ-C30) final scores range from 0 to 100, where higher scores reflect better functioning
Time frame: Up to 68 months
TDD for all participants in patient-reported PF domain score as measured by the EORTC QLQ-C30
TDD is defined as the time from randomization to the first confirmed clinical meaningful deterioration or death. EORTC QLQ-C30 final scores range from 0 to 100, where higher scores reflect better functioning.
Time frame: Up to 68 months
TDD for participants with IHC 3+ tumors in patient-reported symptoms scores as measured by the EORTC QLQ-BIL21 (Pain, Jaundice, Abdominal Pain and Pruritis)
TDD is defined as the time from randomization to the first confirmed clinical meaningful deterioration or death. EORTC Quality of Life Questionnaire - Cholangiocarcinoma and Gallbladder Cancer module (QLQ-BIL21) (Pain, Jaundice, Abdominal Pain, and Pruritis) final scores range from 0 to 100, where higher scores reflect better functioning.
Time frame: Up to 68 months
TDD for all participants in patient-reported symptoms scores as measured by the EORTC QLQ-BIL21 (Pain, Jaundice, Abdominal Pain, and Pruritis)
TDD is defined as the time from randomization to the first confirmed clinical meaningful deterioration or death. EORTC QLQ-BIL21 (Pain, Jaundice, Abdominal Pain, and Pruritis) final scores range from 0 to 100, where higher scores reflect better functioning.
Time frame: Up to 68 months
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Showing the first 100 of 185 sites across 25 countries. Choose a country and city above to see the rest.
Plan to share: Yes — In accordance with ICMJE requirements, Jazz Pharmaceuticals may provide qualified external researchers access to individual participant data (IPD) and clinical trial data that underlie the results of this trial upon request. Qualified researchers can submit a request on https://www.jazzpharma.com/science/clinical-trial-data-sharing/ as outlined. Jazz Pharmaceuticals reserves the right not to consider a request. For inquiries about Jazz's data sharing policy contact clinicaldatasharing@jazzpharma.com
Data sharing details ↗ · www.jazzpharma.com
No publications or documents are linked to this record.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.
Contact study teamGet an email when the registry record changes — status, dates, results — or when someone posts here.
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Studies of the drug tested here: Zanidatamab