# Observational Study on Rectal Cancer to Verify if Response After Chemo-radiotherapy Can be Predicted With a Particular Blood Test.

> **NCT03699410** · — · TERMINATED · sponsor: **Dimitri Christoforidis** · enrollment: 25 (actual)

## Conditions studied

- Locally Advanced Rectal Cancer

## Interventions

- **RADIATION:** Neoadjuvant radiotherapy
- **DRUG:** Neoadjuvant chemotherapy
- **PROCEDURE:** Radical surgery

## Key facts

- **NCT ID:** NCT03699410
- **Lead sponsor:** Dimitri Christoforidis
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** TERMINATED
- **Start date:** 2018-08-28
- **Primary completion:** 2020-10-20
- **Final completion:** 2020-10-20
- **Target enrollment:** 25 (ACTUAL)
- **Why stopped:** failure to identify complete responders since ctDNA disappears after radiotherapy in most patients.
- **Last updated:** 2021-10-13

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT03699410

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT03699410, "Observational Study on Rectal Cancer to Verify if Response After Chemo-radiotherapy Can be Predicted With a Particular Blood Test.". Retrieved via AI Analytics 2026-06-24 from https://api.ai-analytics.org/clinical/NCT03699410. Licensed CC0.

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