A Multicenter, Open-Label, Randomized Controlled Phase III Clinical Trial Comparing Surgery Versus Radical Chemoradiotherapy (Organ Preservation) in Patients With Thoracic Esophageal Squamous Cell Carcinoma Achieving cCR or cPR Following Neoadjuvant Immunochemotherapy (HCHTOG2603)

June 1, 2026 updated by: Henan Cancer Hospital
This is a Phase III, multicenter, open-label, randomized controlled trial. The study aims to compare organ preservation versus esophagectomy in patients with locally advanced, resectable thoracic esophageal squamous cell carcinoma (ESCC) who achieve a complete or partial clinical response (cCR/cPR) following neoadjuvant immunochemotherapy.

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

1044

Phase

  • Phase 3

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 Contact Backup

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

Inclusion Criteria:

-

Based on the study protocol, the Inclusion Criteria translated into English are as follows:

  1. Age 18-75 years, any sex.
  2. ECOG Performance Status 0-1.
  3. Histologically confirmed, previously untreated thoracic esophageal squamous cell carcinoma (ESCC).
  4. Clinical stage cT2N0M0, T3N0-2M0 (AJCC 8th Edition), assessed as resectable with a potential for R0 resection by endoscopic ultrasound (EUS), PET-CT, and contrast-enhanced CT. Patients with cervical lymph node metastasis may also be included if deemed suitable for three-field lymphadenectomy by a multidisciplinary team assessment.

  5. Adequate bone marrow, hepatic, and renal function:

    • Absolute neutrophil count ≥ 1.5 × 10⁹/L, Platelet count ≥ 100 × 10⁹/L, Hemoglobin ≥ 90 g/L.
    • Alanine aminotransferase / Aspartate aminotransferase ≤ 2.5 × Upper Limit of Normal, Total bilirubin ≤ 1.5 × Upper Limit of Normal.
    • Serum creatinine ≤ 1.5 × Upper Limit of Normal or Creatinine clearance ≥ 60 mL/min.
  6. Signed written informed consent form (ICF).

Exclusion Criteria:

-

Based on the study protocol, the Exclusion Criteria you listed translate into English as follows:

  1. History of other malignancy within the past 5 years.
  2. Active autoimmune disease.
  3. Active Hepatitis B Virus (HBV) / Hepatitis C Virus (HCV) / Human Immunodeficiency Virus (HIV) infection.
  4. Severe cardiac or pulmonary insufficiency (Left Ventricular Ejection Fraction < 50%, Forced Expiratory Volume in 1 second < 1 L).
  5. Pregnancy or lactation.

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: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Organ Preservation with Radical Chemoradiotherapy
Patients achieving clinical complete or partial response (cCR/cPR) after neoadjuvant immunochemotherapy will receive definitive chemoradiotherapy for organ preservation. Radiotherapy (50.4 Gy/28 fractions, IMRT) with concurrent weekly chemotherapy (e.g., paclitaxel + cisplatin). Patients with ycCR after chemoradiotherapy will enter observation. Patients with residual disease will undergo salvage esophagectomy.
Drug: Toripalimab + Nab-paclitaxel + Platinum-based Chemotherapy
This is the standard induction therapy administered to all enrolled patients. It consists of the PD-1 inhibitor Toripalimab combined with Nab-paclitaxel
Combination product: Radiation with Concurrent Chemotherapy
Chemotherapy administered concurrently with radiotherapy
Experimental: Immediate Esophagectomy
Patients achieving cCR/cPR after neoadjuvant immunochemotherapy will undergo immediate radical esophagectomy (McKeown or Ivor-Lewis procedure) with 2-field or 3-field lymph node dissection. Postoperative immunotherapy (up to 8 cycles) may be administered based on pathological findings (ypT≥1 or N+).
Drug: Toripalimab + Nab-paclitaxel + Platinum-based Chemotherapy
This is the standard induction therapy administered to all enrolled patients. It consists of the PD-1 inhibitor Toripalimab combined with Nab-paclitaxel
Procedure: Radical Esophagectomy
Standard surgical procedure with lymph node dissection
Active Comparator: Non-Responder Surgery
Patients with stable disease (cSD) or progressive disease (cPD) after neoadjuvant immunochemotherapy will undergo immediate radical esophagectomy, which is the standard of care for this subgroup. Postoperative treatment is determined by pathological findings.
Drug: Toripalimab + Nab-paclitaxel + Platinum-based Chemotherapy
This is the standard induction therapy administered to all enrolled patients. It consists of the PD-1 inhibitor Toripalimab combined with Nab-paclitaxel
Procedure: Radical Esophagectomy
Standard surgical procedure with lymph node dissection

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
3-year Event-Free Survival (EFS) Rate
Time Frame: 3 years after randomization/treatment initiation

Event-Free Survival is defined as the time from randomization (for responders) or from the start of neoadjuvant therapy (for the overall population) until the occurrence of any of the following events:

Local recurrence of esophageal cancer. Distant metastasis. Death from any cause
3 years after randomization/treatment initiation

Collaborators and Investigators

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

Sponsor

Henan Cancer Hospital

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 (Estimated)

June 15, 2026

Primary Completion (Estimated)

March 15, 2032

Study Completion (Estimated)

March 15, 2032

Study Registration Dates

First Submitted

June 1, 2026

First Submitted That Met QC Criteria

June 1, 2026

First Posted (Actual)

June 5, 2026

Study Record Updates

Last Update Posted (Actual)

June 5, 2026

Last Update Submitted That Met QC Criteria

June 1, 2026

Last Verified

June 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2026-150

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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