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A prospective phase II clinical cohort study of preoperative neoadjuvant short-course photon vs proton radiotherapy combined with immunotherapy and chemotherapy for locally advanced rectal cancer

A prospective phase II clinical cohort study of preoperative neoadjuvant short-course photon vs proton radiotherapy combined with immunotherapy and chemotherapy for locally advanced rectal cancer

Status
Active, not recruiting
Phases
Phase 2
Study type
Interventional
Source
ChiCTR
Registry ID
ChiCTR2500107018
Enrollment
Unknown
Registered
2025-08-01
Start date
2025-09-01
Completion date
Unknown
Last updated
2025-08-18

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

Conditions

Locally advanced rectal cancer

Interventions

Photon therapy group:Short-course photon radiotherapy
Proton therapy group:Short-course proton radiotherapy

Sponsors

Shanghai Proton Heavy Ion Hospital/ The Clinical Technology Research And Development Center of Shanghai Proton and Heavy Ion Center
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to 80 Years

Inclusion criteria

Inclusion criteria: 1.Age 18~80 years old (including equal to); 2.Pathologically confirmed adenocarcinoma of the rectum (mucinous adenocarcinoma, signet ring cell carcinoma); 3.cT3-4?N+, stage II/III rectal cancer; 4.PET/CT is required to rule out distant metastases; 5.No prior radiation therapy within the scope of treatment; 6.ECOG 0-2 or KPS = 70; 7.Signed informed consent to receive radiotherapy;

Exclusion criteria

Exclusion criteria: 1.Patients with no clear pathology; 2.Distant metastases are detected prior to treatment; 3.Unable to tolerate or cooperate with the treatment due to physical and mental conditions; 4.Previous radiation therapy in the treatment area; 5.Dose limits for endangered organs cannot be reached to pre-set safe dose limits; 6.Treatment area contains metal implants, etc., which affect radiation therapy and cannot be circumvented; 7.KPS 2; 8.Concomitant severe comorbidities that may affect the delivery of radiotherapy, including: a) unstable angina requiring hospitalization, congestive heart failure, myocardial infarction in the past 6 months b) acute bacterial or systemic fungal infection c) exacerbation of chronic obstructive pulmonary disease or other respiratory diseases requiring hospitalization d) immunosuppressed patients e) concomitant connective tissue disease such as active scleroderma or contraindication to radiation therapy such as lupus; 9.Inability to understand the purpose of treatment or unwillingness to sign the treatment consent form; 10.Lack of capacity for civil conduct or limited capacity for civil conduct;

Design outcomes

Primary

MeasureTime frame
Complete response rate;

Secondary

MeasureTime frame
5 years locoregional relapse-free survival, 5y-LRRFS;Overall survival, OS;Disease-free survival, DFS;Acute (within 3 months) adverse reactions and late (more than 3 months) adverse reactions after radiotherapy;Quality of life,QOL;

Countries

China

Contacts

Public ContactZhang Zhen, Xin Cai

Shanghai Proton Heavy Ion Hospital/ The Clinical Technology Research And Development Center of Shanghai Proton and Heavy Ion Center

xin.cai@sphic.org.cn+86 21 3829666

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Feb 4, 2026