Radiation Therapy and Fluorouracil With or Without Combination Chemotherapy Followed by Surgery in Treating Patients With Stage II or Stage III Rectal Cancer
Public ClinicalTrials.gov record NCT00335816. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
Timing of Rectal Cancer Response to Chemoradiation
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
RATIONALE: Radiation therapy uses high-energy x-rays to kill tumor cells. Drugs used in chemotherapy, such as fluorouracil, oxaliplatin, and leucovorin, work in different ways to stop the growth of tumor cells, either by killing the cells or by stopping them from dividing. Fluorouracil may also make tumor cells more sensitive to radiation therapy. Leucovorin calcium may protect normal cells from the side effects of chemotherapy, and it may help fluorouracil work better by making tumor cells more sensitive to the drug. Giving radiation therapy together with chemotherapy before surgery may make the tumor smaller and reduce the amount of normal tissue that needs to be removed. PURPOSE: This phase II trial is studying how well giving radiation therapy together with fluorouracil with or without combination therapy works in treating patients who are undergoing surgery for stage II or stage III rectal cancer.
Study identification
- NCT ID
- NCT00335816
- Recruitment status
- Active, not recruiting
- Study type
- Interventional
- Phase
- Phase 2
- Enrollment
- 248 participants
Conditions and interventions
Conditions
Interventions
- fluorouracil Drug
- leucovorin calcium Drug
- oxaliplatin Drug
- conventional surgery Procedure
- radiation therapy Radiation
- laboratory biomarker analysis Other
- DNA analysis Genetic
- polymerase chain reaction Genetic
- immunohistochemistry staining method Other
Drug · Procedure · Radiation + 2 more
Eligibility (public fields only)
- Age range
- 18 Years and older
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Aug 2008 (Actual)
- Primary completion
- Dec 2026 (Estimated)
- Completion
- Dec 2026 (Estimated)
- Last update posted
- Jan 14, 2026
2008 – 2026
United States locations
- U.S. sites
- 14
- U.S. states
- 10
- U.S. cities
- 13
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Cancer Care Center at John Muir Health - Concord Campus | Concord | California | 94524-4110 | — |
| City of Hope Medical Center | Duarte | California | 91010-3000 | — |
| St. Joseph Hospital Regional Cancer Center - Orange | Orange | California | 92868-3849 | — |
| Chao Family Comprehensive Cancer Center at University of California Irvine Medical Center | Orange | California | 92868 | — |
| UCSF Helen Diller Family Comprehensive Cancer Center | San Francisco | California | 94115 | — |
| Washington Cancer Institute at Washington Hospital Center | Washington D.C. | District of Columbia | 20010 | — |
| H. Lee Moffitt Cancer Center and Research Institute at University of South Florida | Tampa | Florida | 33612-9497 | — |
| University of Chicago Cancer Research Center | Chicago | Illinois | 60637-1470 | — |
| Masonic Cancer Center at University of Minnesota | Minneapolis | Minnesota | 55455 | — |
| Siteman Cancer Center at Barnes-Jewish Hospital - Saint Louis | St Louis | Missouri | 63110 | — |
| Colon and Rectal Surgery, Incorporated | Omaha | Nebraska | 68114 | — |
| Cleveland Clinic Taussig Cancer Center | Cleveland | Ohio | 44195 | — |
| Knight Cancer Institute at Oregon Health and Science University | Portland | Oregon | 97239-3098 | — |
| Vermont Cancer Center at University of Vermont | Burlington | Vermont | 05405-0110 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
Non-U.S. locations
This page focuses on the U.S. directory. The official record also lists 1 non-U.S. site.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT00335816, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Jan 14, 2026 · Synced Oct 25, 2026
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Open the official record
The complete public registry record, listed eligibility criteria, and available contact information for NCT00335816 live on ClinicalTrials.gov.