NCT07691515 Tislelizumab Biliary Tract Cancer Clinical Landscape Report 2026: Design, Endpoints, Sponsor and Readout Outlook

Move from a broad disease map to a decision-ready trial dossier. This focused report examines NCT07691515—Intraarterial Therapies Plus Tislelizumab Plus Lenvatinib Versus Tislelizumab Plus Gemcitabine-Cisplatin in Unresectable Intrahepatic Cholangiocarcinoma (RAINBOW)—using PatSnap Clinical Trials, Drug & Asset, and Company & Deal Intelligence MCP evidence. Explore PatSnap MCP Servers to reproduce the workflow inside an AI research process.

MCP evidence snapshot: 16 July 2026; publication date: 17 July 2026. Trial records can change after the snapshot and should be rechecked before operational decisions.

Why NCT07691515 is a hot trial to watch

Biliary Tract Cancer is no longer one homogeneous development market. The most consequential programs increasingly compete through a specific mechanism, biomarker, treatment line, delivery strategy or endpoint architecture. NCT07691515 is notable because it tests Tislelizumab, Lenvatinib mesylate in a Phase 3 design with Overall Survival as a primary decision variable. The wider PatSnap topic query returned 1,373 trial records and 1,232 result records, so differentiation depends on evidence quality rather than activity alone.

PatSnap Clinical Trials MCP makes the protocol fields machine-readable, while the companion asset and organization servers add mechanism and sponsor context.

Trial landscape snapshot

Design and endpoint interpretation

The design should be read as an evidence architecture, not just a phase label. The primary endpoint—Overall Survival—determines what uncertainty this study can resolve. The reported time frame is From randomization to death from any cause, assessed up to approximately 48 months. Enrollment of 140 participants and geography in China shape statistical precision, operational risk and external validity. A strong readout will need to be interpreted against baseline risk, prior treatment, assessment schedule, missing-data handling and the clinical relevance of the observed effect.

Benchmark readouts in the same clinical field

• A Phase 1/2 Single Arm Open-Label Clinical Trial of TC-510 In Patients With Advanced Mesothelin-Expressing Cancer (Phase 1/2): -; -; -.
• A Phase II Study of Hepatic Arterial Infusion (HAI) With Floxuridine (FUDR) and Dexamethasone (Dex) Combined With Systemic Gemcitabine and Oxaliplatin in Patients With Unresectable Intrahepatic Cholangiocarcinoma (ICC) (Phase 2): -; -; -; -; -.
• A Phase II Study of Induction Systemic mFOLFIRINOX Followed by Hepatic Arterial Infusion of Floxuridine and Dexamethasone Given Concurrently With Systemic mFOLFIRI as a First-Line Therapy in Patients With Unresectable Liver-Dominant Intrahepatic Cholangiocarcinoma (Phase 2): -; Frequency of Abnormal Liver Function = 0 Participants ; -; -.

These result records are contextual benchmarks rather than direct head-to-head evidence. Cross-trial comparisons can be distorted by population, line of therapy, endpoint definition, follow-up and analysis set. Their value is to clarify what magnitude and type of evidence the market already recognizes.

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Asset and sponsor context

Drug & Asset context: Tislelizumab (Approved; PD-1); Lenvatinib mesylate (Approved; FGFR1 x FGFR2 x FGFR3 x FGFR4 x PDGFRα x RET x VEGFR1 x VEGFR2 x VEGFR3 x c-Kit).

Company & Deal Intelligence context: Zhejiang Cancer Hospital — https://www.zchospital.com.

The sponsor profile matters because a trial's strategic value depends on more than scientific rationale. Manufacturing readiness, portfolio fit, geographic reach, partnering capacity and the ability to fund confirmatory development can determine whether a positive signal becomes a competitive asset.

White space around this program

1. Sharper patient selection: prospective biomarker definitions that identify who is most likely to benefit.
2. Clinically interpretable endpoints: outcomes that connect biological activity with function, symptoms, survival or treatment burden.
3. Sequencing evidence: randomized data after the most relevant contemporary standard of care.
4. Broader external validity: evidence across additional geographies, demographic groups and real-world care settings.
5. Operational differentiation: a development path that closes the readout gap without sacrificing safety monitoring or durability.

What to monitor next

Monitor recruitment status, enrollment changes, protocol amendments, endpoint hierarchy, primary-completion timing, first result indexing, asset ownership and sponsor partnerships. The most important inflection point is not always the headline data release; a change in endpoint, population or ownership can alter probability of success months earlier.

Bottom line

NCT07691515 is a focused lens on Biliary Tract Cancer development. Its value will be determined by whether Tislelizumab can convert the current design into evidence that is clinically meaningful, operationally credible and differentiated from topic-level benchmark readouts.

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