# Angiotensin-converting Enzyme 2 (ACE2) Expression in Tonsils and Adenoids

> **NCT04640610** · — · WITHDRAWN · sponsor: **Assistance Publique - Hôpitaux de Paris**

## Conditions studied

- Adenoidectomy
- Tonsillectomy

## Interventions

- **OTHER:** Storage of operating waste

## Key facts

- **NCT ID:** NCT04640610
- **Lead sponsor:** Assistance Publique - Hôpitaux de Paris
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** WITHDRAWN
- **Start date:** 2021-06-30
- **Primary completion:** 2021-06-30
- **Final completion:** 2021-06-30
- **Target enrollment:** 0 (ACTUAL)
- **Why stopped:** Abandonment of the study project
- **Last updated:** 2026-03-12

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04640610

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04640610, "Angiotensin-converting Enzyme 2 (ACE2) Expression in Tonsils and Adenoids". Retrieved via AI Analytics 2026-06-24 from https://api.ai-analytics.org/clinical/NCT04640610. Licensed CC0.

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