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

> **NCT05081024** · — · RECRUITING · sponsor: **OHSU Knight Cancer Institute** · enrollment: 50 (estimated)

## Conditions studied

- Rectal Adenocarcinoma
- Stage II Rectal Cancer AJCC v8
- Stage IIA Rectal Cancer AJCC v8
- Stage IIB Rectal Cancer AJCC v8
- Stage IIC Rectal Cancer AJCC v8
- Stage III Rectal Cancer AJCC v8
- Stage IIIA Rectal Cancer AJCC v8
- Stage IIIB Rectal Cancer AJCC v8
- Stage IIIC Rectal Cancer AJCC v8

## Interventions

- **PROCEDURE:** Biopsy
- **PROCEDURE:** Biospecimen Collection
- **OTHER:** Electronic Health Record Review

## Key facts

- **NCT ID:** NCT05081024
- **Lead sponsor:** OHSU Knight Cancer Institute
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** RECRUITING
- **Start date:** 2021-09-03
- **Primary completion:** 2026-09-03
- **Final completion:** 2026-09-03
- **Target enrollment:** 50 (ESTIMATED)
- **Last updated:** 2025-09-25

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT05081024

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT05081024, "Establishing a ctDNA Biomarker to Improve Organ Preserving Strategies in Patients With Rectal Cancer". Retrieved via AI Analytics 2026-05-30 from https://api.ai-analytics.org/clinical/NCT05081024. Licensed CC0.

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