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Clinical trialNCT05081024RecruitingObservational

Establishing a ctDNA Biomarker to Improve Organ Preserving Strategies in Patients With Rectal Cancer

SponsorOHSU Knight Cancer InstituteEnrollment50Rectal AdenocarcinomaStage II Rectal Cancer AJCC v8Stage IIA Rectal Cancer AJCC v8Stage IIB Rectal Cancer AJCC v8Stage IIC Rectal Cancer AJCC v8Stage III Rectal Cancer AJCC v8+3 more conditions
View the registry record on ClinicalTrials.gov

Summary

The lay summary the sponsor registered on ClinicalTrials.gov.

This study measures the levels of circulating tumor DNA (ctDNA) in patients with stage II-III rectal cancer before, during, and after treatment to find out if the presence or absence of ctDNA in patient's blood using the Signatera test can be used to gauge how different treatments may affect rectal cancer. ctDNA is DNA from the rectal cancer that is circulating in the blood. The purpose of this study is to understand if the way rectal tumors respond to standard treatment can be associated with varying levels of ctDNA.
clinicaltrials.gov ↗

Investigators

The overall officials registered on this study. Names that resolve to a findmyKOL profile link to it; the rest are shown as registered.

A profile link is shown only when the registered name resolves to a person record with a confident, namesake-checked match; ambiguous names stay unlinked.

Sites

2 registered facilities, with the per-site recruitment status where the registry publishes one. ClinicalTrials.gov does not publish per-site enrollment counts.

United States
  • Ohsu Knight Cancer Institute

    Portland, Oregon, United States

    Adel Kardosh, M.D.,Ph.D.
    Recruiting
  • Fred Hutch

    Seattle, Washington, United States

    Recruiting

Site investigator names are published by ClinicalTrials.gov only while a study recruits, so completed studies list sites without them.

Drugs studied

No drug or biological interventions are in our data for this study. It may test a procedure, device or behavioral intervention, or the intervention list isn't in our current snapshot. See the registry record ↗. Why? →

Registration & key dates

Registry attributes as recorded on the ClinicalTrials.gov study record.

Start
3 Sept 2021
Primary completion
3 Sept 2026
Completion
3 Sept 2026
Last update posted
25 Sept 2025
Registered enrollment
50
Registry id
NCT05081024
clinicaltrials.gov ↗

Source: ClinicalTrials.gov, via the CTTI AACT database, data as of 24 Aug 2026. Registry facts are shown as registered by the study sponsor; findmyKOL does not interpret them.