Neoadjuvant Immunotherapy Combined With Chemotherapy Sequenced With Endoscopic Resection for Esophageal Cancer (Endosurgery-02) (Endosurgery-02)

January 2, 2026 updated by: Shanghai Zhongshan Hospital

Safety and Feasibility of Neoadjuvant Immunotherapy Combined With Chemotherapy Sequenced With Endoscopic Resection for Esophageal Cancer (Endosurgery-02)

This single-center, prospective, single-arm study will evaluate whether giving neoadjuvant chemoimmunotherapy can safely shrink esophageal cancer and allow organ-preserving endoscopic removal in selected patients. Adults with esophageal cancer will receive at least two 3-week cycles of a PD-1 inhibitor (tislelizumab 200 mg on Day 1) plus carboplatin (AUC 3-5, Day 1) and nab-paclitaxel (≤260 mg/m², Day 1). During treatment, routine safety tests are performed. About 3-4 weeks after completing at least two cycles, participants undergo clinical reassessment with examinations and imaging (such as endoscopy, endoscopic ultrasound, PET/CT or CT of the neck, chest, and upper abdomen) to evaluate tumor shrinkage and possible spread. Tumor response is assessed using RECIST 1.1. If a clinical complete response is achieved without obvious nodal disease, endoscopic resection may be performed to preserve the esophagus; otherwise, patients may proceed to surgery or concurrent chemoradiation per clinical judgment. The study focuses on feasibility and safety of this organ-preserving approach and describes tumor responses after therapy. Potential benefits include tumor shrinkage and avoiding major surgery in selected cases; risks include side effects of standard chemotherapy/immunotherapy and procedure-related discomforts from biopsies or endoscopic treatments.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

60

Phase

  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

  • China
    • Shanghai Municipality
      • Shanghai, Shanghai Municipality, China, 200032
        • Recruiting
        • Shanghai Zhongshan Hospital
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Cohort A - Potentially resectable ESCC:

Inclusion Criteria：

  1. Age range: 18-80 years old;
  2. Patients diagnosed with esophageal squamous cell carcinoma (ESCC) through histopathological examination of biopsy tissues from the primary tumor;
  3. Patients with potentially resectable esophageal cancer confirmed by imaging and endoscopic examinations (T1b-3, N0, M0, with a tumor size not exceeding 5 cm and occupying less than 2/3 of the luminal circumference); Patients who have not received any antitumor treatment, including but not limited to surgery, radiotherapy, chemotherapy, immunotherapy, and targeted therapy;
  4. Patients with a preoperative Eastern Cooperative Oncology Group (ECOG) performance status score of 0 or 1;
  5. Patients with a preoperative American Society of Anesthesiologists (ASA) physical status classification of I-III;
  6. Female patients of reproductive age should have a negative pregnancy test and be willing to use effective contraceptive methods during the study period;
  7. Patients who have signed the informed consent form.

Exclusion Criteria:

  1. Patients with potential tracheoesophageal fistula or aortoesophageal fistula;
  2. Patients with severe malnutrition or requiring tube feeding;
  3. Patients with other malignancies that have not been cured within the past 2 years (except for cured basal cell carcinoma of the skin and cured carcinoma in situ of the cervix);
  4. Patients with active autoimmune diseases or a history of autoimmune diseases or symptoms that require systemic corticosteroid treatment or anti-autoimmune drug therapy;
  5. Immunocompromised patients, or patients who are still receiving systemic steroids (prednisone > 10 mg/day or equivalent) or other forms of immunosuppressive therapy within 7 days before the first dose of neoadjuvant therapy in this study;
  6. Patients with active infections requiring systemic treatment within 7 days before the first neoadjuvant therapy in this study;
  7. Patients with a history of allogeneic organ or stem cell transplantation;
  8. Patients with allergies to drugs or related components involved in this study;
  9. Patients who are currently participating in any other clinical study.

Cohort B - Surgery-contraindicated ESCC:

Inclusion Criteria:

  1. Individuals aged above 18 years;
  2. Patients diagnosed with esophageal squamous cell carcinoma through histopathological examination of biopsy tissues from the primary tumor;
  3. Patients with esophageal cancer deemed as surgically contraindicated (including those with cervical esophageal cancer, surgical contraindications, those who refuse surgery, or those considered high-risk for esophagectomy, defined as having at least one of the following characteristics: (1) age over 75 years, (2) Charlson comorbidity index >= 2, (3) presence of moderate lung dysfunction, (4) malnutrition (with a body mass index below 18 kg/m^2)), with a clinical staging of cT1b-3N0M0, a tumor size not exceeding 5 cm, and occupying less than 2/3 of the luminal circumference;
  4. Patients who have not undergone any antitumor treatment, including but not limited to surgery, radiotherapy, chemotherapy, immunotherapy, and targeted therapy;
  5. Female patients of reproductive age should have a negative pregnancy test and be willing to adopt effective contraceptive measures during the study period;
  6. Patients who have signed the informed consent form.

Exclusion Criteria:

  1. Patients with allergies to the drugs or related components involved in this study;
  2. Patients who are currently participating in any other clinical study.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Neoadjuvant Tislelizumab + Carboplatin + Nab-Paclitaxel
Participants receive neoadjuvant chemoimmunotherapy for at least two 3-week cycles: tislelizumab 200 mg IV on Day 1 (Q3W) plus carboplatin AUC 3-5 IV on Day 1 (Q3W) and nab-paclitaxel ≤260 mg/m² IV on Day 1 (Q3W; ~30-minute infusion). Safety is assessed during treatment. About 3-4 weeks after completing ≥2 cycles, participants undergo clinical reassessment (physical exam, labs, and imaging including endoscopy/EUS and PET/CT or CT of neck, chest, and upper abdomen) and tumor response is evaluated by RECIST 1.1. If clinical complete response (cCR) is achieved without obvious nodal disease, endoscopic resection is performed 3-6 weeks after neoadjuvant therapy; otherwise, patients proceed to standard esophagectomy or concurrent chemoradiation per investigator judgment.
Drug: Tislelizumab
Fixed-dose anti-PD-1 monoclonal antibody 200 mg IV on Day 1 of each 3-week cycle (Q3W) as neoadjuvant therapy, administered before any local resection. Given for ≥2 cycles unless contraindicated. Used in combination with carboplatin and nab-paclitaxel in a single-arm regimen; no placebo or comparator.
Drug: Carboplatin
Intervention Description: AUC 3-5 IV on Day 1, Q3W, for ≥2 cycles in combination with tislelizumab and nab-paclitaxel as neoadjuvant therapy.
Drug: Nab-paclitaxel
≤260 mg/m² IV on Day 1, Q3W (~30-min infusion) for ≥2 cycles, combined with tislelizumab and carboplatin in the neoadjuvant regimen.
Procedure: Endoscopic resection
Endoscopic resection (e.g., ESD/EFTR) performed 3-6 weeks after completing ≥2 neoadjuvant cycles only if clinical complete response (cCR) is achieved without clear nodal metastasis, based on endoscopy/EUS and imaging. Technique follows institutional standards with curative intent and margin assessment.
Procedure: Esophagectomy
Standard surgical esophagectomy (McKeown/Ivor-Lewis procedures) for participants not meeting cCR criteria or deemed unsuitable for endoscopic resection after reassessment. Conducted per institutional standard of care, with lymphadenectomy as appropriate.
Radiation: Concurrent chemoradiation
Concurrent chemoradiation per institutional standard for participants not eligible for endoscopic resection and managed non-surgically after reassessment. External-beam radiation delivered with concurrent platinum-taxane chemotherapy as clinically indicated; specific dose/fractionation per treating radiation oncologist.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Organ preservation rate
Time Frame: Up to 12 months after completion of neoadjuvant therapy
Proportion of enrolled participants who achieve esophageal organ preservation after neoadjuvant therapy, defined as: (1) clinical complete response at reassessment ~3-4 weeks after ≥2 cycles; (2) endoscopic tumor resection (e.g., ESD) performed 3-6 weeks after therapy with curative intent and negative margins (R0) when resection is undertaken; and (3) no planned or salvage esophagectomy through 12 months. Participants who require esophagectomy, have persistent/progressive disease precluding endoscopic therapy, or die before assessment are counted as non-preserved.
Up to 12 months after completion of neoadjuvant therapy
Overall safety: incidence of Grade ≥3 adverse events related to drug, endoscopic procedures, surgery, or radiation
Time Frame: Adverse event was assessed peri-procedural of drug-using, endoscopic procedures, surgery, or radiation up to 30 days

Proportion of participants with at least one Grade ≥3 adverse event from any study-specified modality:

  1. Drug-related treatment-related adverse events (TRAEs) graded by CTCAE v5.0 .
  2. Endoscopic complications when resection is performed (clinically significant bleeding requiring intervention, perforation, or stricture requiring dilation/stenting), adjudicated per institutional/ASGE criteria;
  3. Surgical morbidity after esophagectomy (Clavien-Dindo grade ≥III within 90 days of surgery);
  4. Radiation toxicities among those receiving concurrent chemoradiation (CTCAE v5.0 grade ≥3).

Serious adverse events (SAEs) (death, life-threatening event, inpatient hospitalization/prolongation, disability, or other medically important event) and 30-/90-day all-cause mortality are captured; if multiple events occur, the worst grade counts for this composite endpoint
Adverse event was assessed peri-procedural of drug-using, endoscopic procedures, surgery, or radiation up to 30 days
Two-year overall survival rate
Time Frame: From Day 1 of the first neoadjuvant dose to 24 months
Proportion of participants alive 24 months after index date regardless of cause of death (all-cause mortality). The index date is Day 1 of the first neoadjuvant cycle. Survival status is ascertained from clinic visits, hospital records, and scheduled follow-up contacts. The OS rate at 24 months will be estimated using the Kaplan-Meier method with 95% confidence interval. Participants alive at last contact before 24 months are censored at that date; deaths at any time up to 24 months count as events, including those occurring after endoscopic resection, esophagectomy, or chemoradiation.
From Day 1 of the first neoadjuvant dose to 24 months
Biomarkers
Time Frame: Baseline and the day 1 of endoscopy or surgery
Tumor tissue samples and blood samples will be collected for tumor biomarker analysis, including but not limited to analyses of metabolic markers, circulating tumor cells (CTCs), circulating tumor DNA (ctDNA), T-cell receptor sequencing (TCR-seq), and RNA sequencing (RNA-seq).
Baseline and the day 1 of endoscopy or surgery

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Shanghai Zhongshan Hospital

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

July 15, 2025

Primary Completion (Estimated)

September 30, 2027

Study Completion (Estimated)

September 30, 2027

Study Registration Dates

First Submitted

November 25, 2025

First Submitted That Met QC Criteria

January 2, 2026

First Posted (Actual)

January 5, 2026

Study Record Updates

Last Update Posted (Actual)

January 5, 2026

Last Update Submitted That Met QC Criteria

January 2, 2026

Last Verified

January 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • ShanghaiZhongshanEndosurgery02

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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