# ESR1 Mutations in Asian ER+ Metastatic Breast Cancer on Hormonal Therapy-based Treatments

> **NCT04212702** · — · UNKNOWN · sponsor: **National Taiwan University Hospital** · enrollment: 123 (actual)

## Conditions studied

- Metastatic Breast Cancer

## Interventions

- **DRUG:** Hormonal therapy-based treatments

## Key facts

- **NCT ID:** NCT04212702
- **Lead sponsor:** National Taiwan University Hospital
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** UNKNOWN
- **Start date:** 2017-05-22
- **Primary completion:** 2020-02-01
- **Final completion:** 2021-12-31
- **Target enrollment:** 123 (ACTUAL)
- **Last updated:** 2021-01-12

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04212702

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04212702, "ESR1 Mutations in Asian ER+ Metastatic Breast Cancer on Hormonal Therapy-based Treatments". Retrieved via AI Analytics 2026-05-27 from https://api.ai-analytics.org/clinical/NCT04212702. Licensed CC0.

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