# Re-irradiation Therapy of Locally Recurrent Rectal Cancer With Carbon Ion

Source: https://onco.cc/trials/nct05807984/  
OnCo record `nct05807984` (Trial). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

A phase 2 trial in colorectal cancer, run by Xin Cai, not yet recruiting.

## Summary

Re-irradiation Therapy of Locally Recurrent Rectal Cancer With Carbon Ion is a phase 2, interventional study registered as NCT05807984 by Xin Cai, with a registry enrolment figure of 31 participants, started 2023-05-01 and due to reach its primary completion in 2025-12-31. Interventions recorded: Carbon ion radiation therapy DT: 74Gy/20 fractions. Conditions listed: Rectal Cancer; Recurrent. Primary outcome: local control. Colorectal eligibility wording from the registry: "* 1\) pathologically confirmed rectal adenocarcinoma (including mucinous adenocarcinoma and signet-ring cell carcinoma) and LRRC confirmed by biopsy or clinical diagnosis,". Sites: China. No results are recorded here; the registry entry is the source.

## Fields

- Kind: Trial
- Status: planned
- Last checked: 2026-09-24
- Tags: ctgov-ingest; colorectal-deep-dive
- Registry id: NCT05807984
- Phase: 2
- Setting: A Prospective Phase II Clinical Study of Carbon Ion Re-irradiation in Unresectable Locally Recurrent Rectal Cancer
- Sponsor: Xin Cai
- Enrolled: 31

## Sources

- ClinicalTrials.gov NCT05807984: https://clinicaltrials.gov/study/NCT05807984

## Connected records

- cancers: [Rectal cancer](https://onco.cc/cancers/rectal-cancer/)
- technologies: [IMRT / IGRT (modern external beam)](https://onco.cc/technologies/imrt-igrt/)
- terms: [Colorectal cancer trials open today (registry snapshot)](https://onco.cc/terms/colorectal-trials-open-today/)

---
JSON: https://onco.cc/api/v1/entities/nct05807984.json