# Radiotherapy Versus Low-Dose Tamoxifen Following Breast Conserving Surgery for Low-Risk Breast Ductal Carcinoma in Situ

> **NCT04046159** · PHASE3 · UNKNOWN · sponsor: **National Taiwan University Hospital** · enrollment: 810 (estimated)

## Conditions studied

- Breast Ductal Carcinoma in Situ

## Interventions

- **DRUG:** Low-dose tamoxifen
- **RADIATION:** Whole breast radiotherapy

## Key facts

- **NCT ID:** NCT04046159
- **Lead sponsor:** National Taiwan University Hospital
- **Sponsor class:** OTHER
- **Phase:** PHASE3
- **Study type:** INTERVENTIONAL
- **Status:** UNKNOWN
- **Start date:** 2019-04-30
- **Primary completion:** 2025-12-31
- **Final completion:** 2025-12-31
- **Target enrollment:** 810 (ESTIMATED)
- **Last updated:** 2019-08-06

## Collaborators

- [object Object]
- [object Object]
- [object Object]
- [object Object]
- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04046159

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04046159, "Radiotherapy Versus Low-Dose Tamoxifen Following Breast Conserving Surgery for Low-Risk Breast Ductal Carcinoma in Situ". Retrieved via AI Analytics 2026-06-05 from https://api.ai-analytics.org/clinical/NCT04046159. Licensed CC0.

---

*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*