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Concurrent chemoradiotherapy (CRT)
Radiotherapy 25 ㏉/5 fractions (start concomitantly at D1)
↓ ↓ ↓ ↓ ↓
Radical surgery 6 weeks after completion of chemoradiotherapy
5-Fluorouracil 400㎎/㎡/day + LV 20㎎/㎡/day IV bolus during the radiotherapy
Radiotherapy using tomotherapy is delivered in 5 Gy daily fractions for a total of 25 Gy in 5 fractions.
A bolus injection of 5-fluorouracil (400 mg/m2/d)and leucovorin (20 mg/m2/d) is delivered concurrently on day 1-5 during radiotherapy.
Total mesorectal excision is performed within 6±2 weeks. The pathological response of downstaing is the study endpoint.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| short-course CRT-5FU | Experimental |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Radiation: short-course preoperative chemoradiotherapy | Radiation | Drug: 5-Fluorouracil 5-Fluorouracil is administered intravenously at a dose of 400 mg/m2 once daily continuous regimen during RT(5 days). Radiation: Localization, simulation and immobilization Radiation dose and planning Total dose 25Gy, 5 fractions (5 Gy/day). |
| Measure | Description | Time Frame |
|---|---|---|
| To evaluate the pathologic response | downstaging(ypT0-2N0M0)rate | After surgery with pathology data |
| Measure | Description | Time Frame |
|---|---|---|
| Tumor regression grade & MR volumetry | To evaluate the tumor regression grade & MR volumetry | After surgery with pathology data for TRG, at the pretreatment work-up and 1-4 days befor surgery |
| Acute/ late toxicities |
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Inclusion Criteria :
Exclusion Criteria :
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| National Cancer Center Korea | Goyang-si | Gyeonggi-do | 410-769 | South Korea |
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| ID | Term |
|---|---|
| D012004 | Rectal Neoplasms |
| ID | Term |
|---|---|
| D015179 | Colorectal Neoplasms |
| D007414 | Intestinal Neoplasms |
| D005770 | Gastrointestinal Neoplasms |
| D004067 | Digestive System Neoplasms |
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|
To evaluate the acute and late toxicities
| preoperative CCRT to 3 months after surgery |
| D009371 | Neoplasms by Site |
| D009369 | Neoplasms |
| D004066 | Digestive System Diseases |
| D005767 | Gastrointestinal Diseases |
| D007410 | Intestinal Diseases |
| D012002 | Rectal Diseases |