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Clinical study on the use of short-course radiotherapy combined with dual immunotherapy and chemotherapy to enhance efficacy in patients with low-to-mid risk locally advanced rectal cancer who are unresponsive or poorly responsive to neoadjuvant chemotherapy

Clinical study on the use of short-course radiotherapy combined with dual immunotherapy and chemotherapy enhancement for patients with medium and low-risk locally advanced rectal cancer who are ineffective or inefficient to neoadjuvant chemotherapy

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
ChiCTR
Registry ID
ChiCTR2600117972
Enrollment
Unknown
Registered
2026-01-30
Start date
2025-11-14
Completion date
Unknown
Last updated
2026-02-02

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Rectal cancer

Interventions

Intensified Treatment Group:After confirming non-response post 2 cycles of CAPOX chemotherapy, eligible patients providing informed consent will be enrolled. They will receive short-course radiotherap
patients will be followed by long-term follow-up and review.

Sponsors

West China Hospital of Sichuan University
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to 75 Years

Inclusion criteria

Inclusion criteria: 1. Age: 18-75 years old; gender is not limited; 2. Colonoscopy or anal examination, with the lower boundary of the lesion being =9g/dL, white blood cell count (WBC) >= 3.5/4.0×10^9/L, neutrophils >= 1.5×10^9/L, platelets (PLT) >= 100×10^9/L. 2) biochemical examination criteria: Crea and BIL <= 1.0 times the upper limit of normal (ULN), alanine aminotransferase (ALT) and aspartate aminotransferase (AST) <= 2.5×ULN, alkaline phosphatase (ALP) <=2.5×ULN, total bilirubin (Tbil) <=1.5×ULN, normal thyroid function; 8. No history of allergy to 5-FU-based drugs and platinum compounds; 9. No other immune diseases; 10. Patients voluntarily agree to participate in this study, sign the informed consent form, have good compliance, and cooperate with follow-up.

Exclusion criteria

Exclusion criteria: 1. Patients with confirmed distant metastasis at initial diagnosis or before enrollment; 2. Patients with previous or concurrent other malignancies (including synchronous colon cancer), except for cured basal cell carcinoma of the skin and carcinoma in situ of the cervix; 3. Pregnant or breastfeeding women; 4. Patients with severe cardiovascular disease and poorly controlled diabetes; 5. Patients with mental disorders; 6. Patients with severe infections; 7. Patients undergoing thrombolytic/anticoagulant therapy, with bleeding diathesis or coagulation dysfunction; or having experienced aneurysm, stroke, transient ischemic attack, or arteriovenous malformation in the past year; 8. Patients with a history of kidney disease, with proteinuria detected in urine tests, or with significant abnormalities in clinical renal function; 9. Patients with a history of autoimmune diseases, or with severe allergies in the past; 10. Patients allergic to 5-Fu or platinum-based drugs; 11. Patients with severe digestive tract diseases affecting the absorption of oral chemotherapy drugs.

Design outcomes

Primary

MeasureTime frame
Complete response rate(CR);

Secondary

MeasureTime frame
R0 resection rate;Incidence of adverse events during treatment;Colostomy rate;Surgical safety indicators;;Quality of life (including anal, urinary system, and sexual function);3 Years overall survival,3y-OS;3 Years distant metastasis-free survival,3y-DMFS;Local regional recurrent-free survival,LRRFS;3 Years Disease-Free Survival, 3y-DFS;

Countries

China

Contacts

Public ContactDeng Xiangbing

West China Hospital of Sichuan University

247940362@qq.com+86 189 8060 5562

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Feb 7, 2026