Neoadjuvant Chemoradiotherapy and Consolidation Chemotherapy for Rectal Cancer: A Randomized Controlled Trial

NCT ID: NCT05496491

Last Updated: 2024-10-08

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

NA

Total Enrollment

84 participants

Study Classification

INTERVENTIONAL

Study Start Date

2022-08-30

Study Completion Date

2026-08-30

Brief Summary

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The purpose of this protocol is to compare neoadjuvant chemoradiation plus consolidation chemotherapy before surgical resection with the standard neoadjuvant chemoradiation followed by surgical resection and adjuvant chemotherapy in patients with rectal cancer.

Detailed Description

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Colorectal cancer is the second leading cause of cancer-related deaths worldwide. It is estimated that 10% of cancer mortality is attributed to malignant neoplasms of the colon and rectum. More specifically, in the United States alone, 53,200 colorectal cancer deaths were reported.

The current treatment of choice for locally advanced rectal cancer (Stage II/ III) is the combination of neoadjuvant chemoradiation followed by radical surgical resection based on the principles of total mesorectal excision (TME) after a 8-12 weeks period. Therapy is usually completed with the administration of adjuvant chemotherapy based on oxaliplatin and fluoropyrimidines. This combined approach allowed the reduction of local recurrence at levels around 5%. Despite the impressive results in local control, the same was not confirmed for the long-term, overall survival. Possible explanations to that are: a) the compliance and completion of the treatment schemes during the postoperative period were low and b) there was a delay in the administration of adjuvant chemotherapy; both could lead to subclinical metastatic disease progression.

On the basis of achieving both goals, (i.e., local control through neoadjuvant radiotherapy and metastatic disease control through systemic chemotherapy) the administration of the two therapies in the preoperative period was proposed, in the form of combined or total neoadjuvant therapy.

Additional theoretical benefits of total neoadjuvant therapy is faster defunctioning stoma reversal, as well as, the possibility of a more accurate evaluation of the tumor biological behavior, thus enabling a safer staging for patients who would be candidates for a watch and wait protocol. Furthermore, for patients who will eventually undergo surgery, total neoadjuvant therapy could probably increase R0 resection and sphincter-preservation rates.

However, many researchers question the safety and efficacy of total neoadjuvant therapy. First, the administration of neoadjuvant chemotherapy significantly increases the risk of severe toxicity from cytotoxic agents. At the same time, according to the results of one of the largest prospective randomized trials, the addition of neoadjuvant chemotherapy into the treatment algorithm did not offer any advantage in the pathological response, 5-year overall and disease-free survival rates. Finally, there is considerable heterogeneity in the current literature, most likely reflecting the different schemes used in different trials regarding the radiotherapy regimen, the chemotherapy regimen as well as the sequence of each one in each protocol.

The investigators believe that it is difficult to interpret any differences in results when multiple parameters have been changed in a comparative trial. For this reason when testing the current standard neoadjuvant protocol to the new trend of total neoadjuvant therapy it was decided to keep the same scheme and timing for the experimental group while the only parameter which was different was the use of the classic chemotherapy scheme during the waiting period following chemoradiation and before surgery.

Conditions

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Rectal Neoplasms

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

The study will employ a prospective, parallel randomized-controlled design
Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

There will be no blindness at the level of the patient, the treating physicians (surgeon, oncologist, radiotherapist) and the researcher who will record the data.

Study Groups

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Neoadjuvant Chemoradiotherapy and Consolidation Chemotherapy

The experimental group will receive the standard 5-week neoadjuvant chemoradiotherapy (CRT). Thereafter, all patients will commence consolidation chemotherapy. At the 6th week after the end of CRT, patients will undergo MRI re-staging: In case of non-response (mrTRG 5) they will be submitted immediately to surgery, and, subsequently, excluded from the trial.

In case of response (mrTRG 2-4) they will receive consolidation chemotherapy for the whole waiting period between the end of CRT and surgery - 12 weeks.

Group Type EXPERIMENTAL

Neoadjuvant Chemoradiotherapy

Intervention Type RADIATION

5-week neoadjuvant radiotherapy regimen (28 x 1.8 Gy) combined with Capecitabine (bid 800 mg/m2, twice daily, on days 1-33-38)

Consolidation Chemotherapy

Intervention Type DRUG

CAPOX (Capecitabine bid1000 mg/m2 and Oxaliplatin 130 mg/m2, day 1, every 3 weeks) or alternatively FOLFOX

Neoadjuvant Chemoradiotherapy and Adjuvant Chemotherapy

The control group will receive the standard 5-week neoadjuvant chemoradiotherapy regimen. Six weeks after completion the patient will be re-staged with rectal MRI and depending on the response will be operated (TME): immediately in case of non-response (mrTRG 5) or after an additional 6-week delay (overall 12 weeks after the end of chemoradiotherapy) in case of partial response (mrTRG 2-4). Adjuvant chemotherapy will be, also, administered.

Group Type ACTIVE_COMPARATOR

Neoadjuvant Chemoradiotherapy

Intervention Type RADIATION

5-week neoadjuvant radiotherapy regimen (28 x 1.8 Gy) combined with Capecitabine (bid 800 mg/m2, twice daily, on days 1-33-38)

Adjuvant Chemotherapy

Intervention Type DRUG

8 cycles of CAPOX (Capecitabine bid 1000 mg/m2, twice daily, day 1-14, every 3 weeks and Oxaliplatin 130 mg/m2, day 1, every 3 weeks) or alternatively, 12 cycles of folinate, fluorouracil and oxaliplatin (FOLFOX)

Interventions

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Neoadjuvant Chemoradiotherapy

5-week neoadjuvant radiotherapy regimen (28 x 1.8 Gy) combined with Capecitabine (bid 800 mg/m2, twice daily, on days 1-33-38)

Intervention Type RADIATION

Adjuvant Chemotherapy

8 cycles of CAPOX (Capecitabine bid 1000 mg/m2, twice daily, day 1-14, every 3 weeks and Oxaliplatin 130 mg/m2, day 1, every 3 weeks) or alternatively, 12 cycles of folinate, fluorouracil and oxaliplatin (FOLFOX)

Intervention Type DRUG

Consolidation Chemotherapy

CAPOX (Capecitabine bid1000 mg/m2 and Oxaliplatin 130 mg/m2, day 1, every 3 weeks) or alternatively FOLFOX

Intervention Type DRUG

Other Intervention Names

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nCRT AC CC

Eligibility Criteria

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Inclusion Criteria

* Histologically confirmed rectal adenocarcinoma
* cT3, cT4, threatened CRM / MRF, EMVI (+), ≥N1
* Multidisciplinary tumor board decision for neoadjuvant treatment
* Tumor distance from the anal verge \<15 cm based on endoscopy or magnetic resonance imaging
* Patient 18 to 80 years old
* General health condition status WHO 0-1
* Absence of co-morbidities that may affect treatment
* Neutrophils \>1,500 / mm3, platelets \>100,000 / mm3, hemoglobin\> 10 g / dL, normal creatinine, and creatinine clearance\> 50 mL / min
* Signed informed consent of the patient

Exclusion Criteria

* Distant metastases
* Non-resectable cancer
* Contraindications for the administration of chemotherapy
* Previous pelvic radiotherapy or chemotherapy
* History of inflammatory bowel disorders
* History of angina, acute myocardial infarction or heart failure
* Active sepsis or systemic infection
* Untreated physical and mental disability
* Synchronous malignancy
* Pregnancy or breast-feeding
* Lack of compliance with the protocol process
* Non-granting of signed informed consent
Minimum Eligible Age

18 Years

Maximum Eligible Age

80 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Larissa University Hospital

OTHER

Sponsor Role lead

Responsible Party

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Perivoliotis Konstantinos

Perivoliotis Konstantinos, Principal Investigator

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Konstantinos Perivoliotis, MD

Role: PRINCIPAL_INVESTIGATOR

University Hospital of Larissa

George Tzovaras, Prof

Role: STUDY_DIRECTOR

University Hospital of Larissa

Locations

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Department of Surgery, University Hospital of Larissa

Larissa, , Greece

Site Status RECRUITING

Countries

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Greece

Central Contacts

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Konstantinos Perivoliotis, MD

Role: CONTACT

2413501000 ext. 0030

George Tzovaras, Prof

Role: CONTACT

2413502804 ext. 0030

Facility Contacts

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Konstantinos Perivoliotis, MD

Role: primary

00302413501000

George Tzovaras, Professor

Role: backup

00302413502804

References

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Provided Documents

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Document Type: Study Protocol

View Document

Document Type: Informed Consent Form

View Document

Other Identifiers

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NCCCRC

Identifier Type: -

Identifier Source: org_study_id

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