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Development of a Genome-based Platform for Personalized Treatment in Locally Advanced Rectal Cancer Patients

NCT04738214 · Status: UNKNOWN · Type: OBSERVATIONAL · Enrollment: 39

Last updated 2021-02-04

No results posted yet for this study

Summary

This study is aimed to develop a genome-based platform to predict patients who can achieve pathologic complete response after neoadjuvant treatment in locally advanced rectal cancer. The main treatments for locally advanced rectal cancer is surgical removal such as lower anterior resection after neoadjuvant CCRT. About 10-40% of patients showed pathologic complete response after neoadjuvant CCRT. Mandard tumor regression grade (TRG) is used to grade the histologic tumor response after neoadjuvant treatment. TRG 1 represents the pathologic complete response and TRG2 as histologically small group of cancer cells. Accordingly, TRG1 and 2 are expressed as good responder.

Even though the surgery is being performed as an essential treatment, there are various surgery-related sequelae such as colostomy. Also, in some patients, surgery may be refused or surgery may not be performed due to an underlying disease. About 15-20% of local recurrence was reported in patients who did not undergo surgery and the 3-year survival rate was 96.6%.

Colorectal cancer genetically can be divided into 4-subtypes. With the recent development of genome testing technology, genome analysis has been actively conducted in colorectal cancer. The most commonly known genetic subtype of colorectal cancer is classified into a total of 4 types as consensus molecular subtype (CMS); CMS1, CMS2, CMS3, CMS4. However, this was analyzed in colorectal cancer patients who did not undergo radiotherapy. There is no data regarding the response to radiation therapy according to each genetic subtype. Therefore, classifying the subtypes through genomic analysis and studying the responsiveness to radiotherapy in each subtype is needed.

In this study, we aimed to develop a platform that predicts pathologic tumor response after CCRT based on genomic information. Furthermore, being able to select patients who can wait-and-see without surgery using platform.

Conditions

  • Locally Advanced Rectal Cancer

Interventions

OTHER

Neoadjuvant CCRT+operation +/- adjuvant treatment

Patients receive neoadjuvant CCRT and operation. Adjuvant treatment after operation is performed depending on pathologic response. The patients showing pathologic complete response after neoadjuvant CCRT are not treated with any adjuvant treatment.

Sponsors & Collaborators

  • Yonsei University

    lead OTHER

Principal Investigators

  • Woong Sub Koom · Severance Hospital

Eligibility

Min Age
19 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2021-02-28
Primary Completion
2025-01-18
Completion
2025-01-18

Countries

  • South Korea

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT04738214 on ClinicalTrials.gov