- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02017704
Chemoradiation or Brachytherapy for Rectal Cancer (CORRECT)
Chemoradiation OR Brachytherapy for RECTal Cancer
Study Overview
Status
Conditions
Detailed Description
Locally advanced rectal carcinoma continues to be a major oncologic problem in the United States with approximately 40,000 new cases diagnosed in 2011. For stage II/III rectal carcinoma, adjuvant chemoradiation and total mesorectal excision (TME) represent the major treatment advances that have increased cure rates over the past 30 years.
In the setting of TME, a landmark phase III German trial of stage II/III rectal cancer patients established neoadjuvant 5FU-based chemoradiation (NCRT) as standard of care over the same regimen given post-operatively. The preoperative arm showed superior local control (6% vs. 13% p=0.006), a complete pathologic response of 8%, a higher rate of sphincter preservation and less grade 3 toxicity compared to post-operative treatment. However, disease-free and overall survival (76% versus 74%, respectively) were no different because of the high rate of distant metastasis occurring in over 1/3 of patients (5yr DM 36 vs 38%,p=0.84). Importantly, those attaining a pathologic complete response had a decreased rate of distant metastasis and improved disease-free survival. Drawbacks to the regimen include acute grade 3 or 4 toxicity in 27% of patients, low compliance rates with postoperative chemotherapy (27 - 50%), and an overall decline in anorectal function shown by long-term studies.
Given the excellent locoregional control reported in TME surgical series, several trials have investigated whether certain patients may be spared preoperative radiotherapy. Two large randomized trials by Dutch and British investigators showed that a short preoperative course of hypofractionated EBRT (25 Gy in 5 fractions) followed by TME surgery decreased locoregional recurrence by 2/3 as compared to patients treated with TME surgery alone. In the Dutch trial, patients with mid and distal rectal cancers were most likely to benefit from radiotherapy. In these patients, preoperative radiation was shown to decrease locoregional recurrence by 5-fold (10% to 2%); however, the hypofractionated preoperative EBRT regimen was associated with a significant increase in acute and chronic morbidity. Indeed, the Dutch study revealed that irradiated patients, when compared to surgery alone, had more perineal wound healing problems after abdominoperineal resection (29% vs. 19%), worsening deterioration of anal sphincter dysfunction, and more severe long-term effects related to sexual functioning both in males (p=0.004) and females (p<0.002). Additionally, colleagues have reported a consistent negative impact on bowel function in those patients undergoing sphincter preservation. In reviewing the long-term data of the Swedish short course preoperative EBRT rectal cancer trial, Birgisson also reported a higher incidence of secondary tumors (9.5%) in patients treated with preoperative radiation when compared to patients having surgery alone (4.3%).
Modern approaches to address the risk of distant metastasis and poor compliance with adjuvant systemic chemotherapy (following NCRT) have incorporated newer effective chemotherapy agents earlier in the treatment protocol. For example, oxaliplatin has been one of the most widely studied agents as a result of its proven efficacy when combined with 5-fluorouracil and leucovorin (FOLFOX) both in the metastatic and adjuvant settings for colon cancer. Initial phase II studies with the addition of oxaliplatin to standard 5-FU based NCRT appeared to show improved pathologic complete response rates compared to standard NCRT. However, two phase III trials clearly show that the addition of oxaliplatin during 5FU-based NCRT does not significantly improve pathologic complete response, locoregional control, distant metastasis or survival but does increase acute grade 3-4 toxicity by two to three-fold.
One approach to limit toxicity from external beam radiotherapy is the use of intensity modulated radiation therapy (IMRT). IMRT can limit radiation dose to normal rectum (above and below the tumor) and surrounding organs at risk (OARs) such as bladder and sexual organs. IMRT utilizes multiple beams of radiation to treat the rectal tumor plus a margin and limits dose to OARs. While IMRT decreases radiation dose to normal structures, it requires an additional 2-3 cm margin for microscopic extension (clinical treatment volume=CTV), set-up error, and rectal motion (planning treatment volume=PTV). Furthermore, IMRT still requires 5-6 weeks of radiation with concurrent chemotherapy, is substantially more expensive than conformal radiation, and is especially prohibitive in countries where access to technology necessary for IMRT is limited. Based on the preliminary results of RTOG 0822 and others, it still remains to be determined whether IMRT confers a statistically significant improvement in pCR, toxicity rates and QOL relative to standard NCRT.
A novel approach to limit radiation toxicity is the use of high dose rate endorectal brachytherapy (Endo-HDR). Endo-HDR involves the placement of a silicon multicatheter applicator within the rectum to deliver large doses to the rectal tumor and mesorectum with rapid dose fall off to the surrounding organs. An Iridium 192 high dose rate brachytherapy source attached to a wire is inserted into each catheter to deliver a high dose of radiation therapy the tumor. High dose rate brachytherapy has been well established in various malignancies (prostate, uterine, sarcoma, head and neck) to escalate radiation dose to the tumor over a short period of time while sparing normal tissue. Compared with NCRT and IMRT, Endo-HDR delivers treatment internally to the tumor without having to pass through surrounding normal tissue and organs. It requires smaller margins (CTV/PTV=~1 cm) on the tumor since the applicator is positioned under fiducial guidance over the tumor without need for a margin for organ motion allowing greater sparing of OARs. Furthermore, the area of the rectum exposed to high dose radiotherapy is surgically removed at the time of resection which further minimizes chronic toxicity. Important structures that may be spared include bone marrow, small bowel, bladder, the autonomic nerves, sexual organs, anal sphincter and skin. Considering that 1/3 of patients will develop metastases, limiting bone marrow toxicity may contribute to better compliance with systemic treatment and allow for a better treatment strategy to target systemic recurrence. Another distinct advantage of Endo-HDR is the shortened treatment time (1 versus 6 weeks). Endo-HDR therefore provides a major logistic advantage for patients who may benefit from neoadjuvant therapy but who are geographically distant from radiation centers, elderly, or medically infirmed.
Study Type
Enrollment (Actual)
Phase
- Phase 2
Contacts and Locations
Study Locations
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Florida
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Tampa, Florida, United States, 33607
- Moffitt Cancer Center
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Georgia
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Atlanta, Georgia, United States, 30322
- Winship Cancer Institute, Emory University
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Maryland
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Baltimore, Maryland, United States, 21287
- The SKCCC at Johns Hopkins
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New York
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New York, New York, United States, 10003
- Beth Israel Hospital
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Description
Inclusion Criteria:
- Confirmed adenocarcinoma of the rectum
- Appropriate tumor staging and location
- Patients should be suitable candidates for surgery and chemotherapy
- ECOG/WHO performance status 0-1
- Patients must be 18 years or older
- No previous history of pelvic radiation
- Patients must have acceptable organ and marrow function
- Non pregnant, non-breast feeding females under active contraception
- Ability to understand and willingness to sign a written informed consent document.
Exclusion Criteria:
- Evidence of distant metastatic disease
- Evidence of sphincter invasion on MRI
- Prior history of radiation to the pelvis
- Prior malignancy except for adequately treated basal cell or squamous cell skin cancer, cervical carcinoma in situ, DCIS, or other cancer from which the patient has been disease free for at least 3 years
- Presence of multiple small bowel loops trapped within the immediate tumor bed (post hysterectomy or prostatectomy).
- Use of any investigational agent within the 4 weeks preceding enrollment
- Previous exposure to chemotherapy for rectal cancer
- Uncontrolled intercurrent illness including but not limited to, ongoing or active infections (or infections requiring systemic treatment), symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements
- Pregnant and breastfeeding women are excluded, as well as women of child-bearing potential who are unwilling or unable to use an acceptable method of birth control (hormonal or barrier method of birth control; abstinence) to avoid pregnancy for the duration of the study. Should a woman become pregnant or suspect she is pregnant while participating in this study she should inform her treating physician immediately.
- Women who are not post-menopausal and have a positive urine or serum pregnancy test or refuse to take a pregnancy test.
- Contraindication for safe MRI, implants, or other conditions that interfere with imaging required for the study (e.g., pacemaker or non-MRI compatible hip prostheses). Note: Subjects with bilateral hip implants are not eligible for the study. Subjects with a unilateral hip implant may be eligible assuming the implant is MRI compatible and does not present artifact on MRI in the areas of interest.
- Subject is pacemaker dependent.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Single
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: IMRT and Capecitabine
Patients will receive IMRT along with capecitabine. External radiotherapy will be based on contouring guidelines from the RTOG atlas and Radiation Therapy Oncology Group (RTOG 0822) with some modifications Followed by:
Cycle length: 14 days (2 weeks) Duration of treatment: 12 cycles Then: Surgical Resection |
Capecitabine shall be delivered at 825mg/m2 BID during IMRT radiotherapy
Other Names:
Patients will receive IMRT along with capecitabine.
External radiotherapy will be based on contouring guidelines from the RTOG atlas and Radiation Therapy Oncology Group (RTOG 0822) with some modifications
Other Names:
After the patient has been identified as a candidate for the trial, the surgeon will assess the patient and will determine: Exact height and location of tumor with regards to the anal margin as measured by a rigid or flexible proctoscope and/or digital exam. Mobility of tumor as assessed if possible by rectal exam Type of surgical procedure: Abdominoperineal resection vs. sphincter saving procedures, which will include colo-anal with mucosectomy vs. stapled anastomosis. |
Experimental: Endo-HDR
Patients will be treated with a daily dose of 6.5 Gy over four consecutive days for a total of 26 Gy Followed by:
Cycle length: 14 days (2 weeks) Duration of treatment: 12 cycles Then: Surgical Resection |
Other Names:
After the patient has been identified as a candidate for the trial, the surgeon will assess the patient and will determine: Exact height and location of tumor with regards to the anal margin as measured by a rigid or flexible proctoscope and/or digital exam. Mobility of tumor as assessed if possible by rectal exam Type of surgical procedure: Abdominoperineal resection vs. sphincter saving procedures, which will include colo-anal with mucosectomy vs. stapled anastomosis.
Patients will be treated with a daily dose of 6.5 Gy over four consecutive days for a total of 26 Gy
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Number of Patients With Pathologic Complete Response
Time Frame: Up to 60 months
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Pathologic complete response rate is reported as the number of patients who achieve pathologic complete response after the treatment for each arm. As per the NCCN guidelines, pathologic response is graded by the system recommended by the AJCC Cancer Staging Manual and CAP guidelines:
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Up to 60 months
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Number of Participants With Grade 3 or Higher Adverse Events
Time Frame: Up to 60 months
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Number of participants with grade 3 or higher adverse events will be listed by relationship. Grading is by CTCAE 4 guidelines. Relationship, as determined by PI, is unrelated/unlikely/possible/probable/definite. |
Up to 60 months
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Change in EORTC QLQ-C30 Global Health Status Score
Time Frame: baseline, preop, postop, and at follow ups Y1-5
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Patients were given the EORTC QLQ-C30 at baseline, preop, postop, and at follow ups Y1-5. The forms were scored as per the manual available at EORTC. Raw scores are transformed to fall in a range of 0-100. Generally, higher scores on QoL scales represent higher levels of QoL. The scores are reported as the mean of the Global Health Status/QoL scale score when more than 1 patient completed the form for a time point. If only 1 form was available for a time point, then the score for that form is reported. |
baseline, preop, postop, and at follow ups Y1-5
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Time to Death
Time Frame: Up to 60 months
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Assessing the difference time to death rates among study participants.
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Up to 60 months
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Time to Distant Metastases Free Survival
Time Frame: Up to 60 months
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Compare distant metastasis for both Endo-HDR and CRT.
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Up to 60 months
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Time to Progression Free Survival
Time Frame: Up to 60 months
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Compare progression free survival for both Endo-HDR and CRT.
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Up to 60 months
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Time to Local Disease Recurrence
Time Frame: Up to 60 months
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Compare locoregional control for both Endo-HDR and CRT.
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Up to 60 months
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Collaborators and Investigators
Collaborators
Investigators
- Principal Investigator: Amol K Narang, M.D., The SKCCC at Johns Hopkins
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimated)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
- Digestive System Diseases
- Neoplasms
- Neoplasms by Site
- Gastrointestinal Neoplasms
- Digestive System Neoplasms
- Gastrointestinal Diseases
- Intestinal Diseases
- Intestinal Neoplasms
- Rectal Diseases
- Colorectal Neoplasms
- Rectal Neoplasms
- Physiological Effects of Drugs
- Molecular Mechanisms of Pharmacological Action
- Antimetabolites, Antineoplastic
- Antimetabolites
- Antineoplastic Agents
- Immunosuppressive Agents
- Immunologic Factors
- Protective Agents
- Micronutrients
- Vitamins
- Antidotes
- Vitamin B Complex
- Fluorouracil
- Capecitabine
- Oxaliplatin
- Leucovorin
Other Study ID Numbers
- J1360
- NA_00082167 (Other Identifier: JHMIRB)
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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