# Adjuvant Radiation Therapy Compared With Observation After Surgery in Treating Women With Estrogen Receptor Positive or Progesterone Receptor Positive Ductal Carcinoma In Situ of the Breast Who Are Receiving Tamoxifen or Anastrozole

> **NCT00077168** · PHASE2 · UNKNOWN · sponsor: **Institute of Cancer Research, United Kingdom** · enrollment: 2000 (estimated)

## Conditions studied

- Breast Cancer

## Interventions

- **DRUG:** anastrozole
- **DRUG:** tamoxifen citrate
- **PROCEDURE:** adjuvant therapy
- **RADIATION:** radiation therapy

## Key facts

- **NCT ID:** NCT00077168
- **Lead sponsor:** Institute of Cancer Research, United Kingdom
- **Sponsor class:** OTHER
- **Phase:** PHASE2
- **Study type:** INTERVENTIONAL
- **Status:** UNKNOWN
- **Start date:** 2004-04
- **Primary completion:** 2017-09
- **Final completion:** —
- **Target enrollment:** 2000 (ESTIMATED)
- **Last updated:** 2009-02-09


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00077168

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00077168, "Adjuvant Radiation Therapy Compared With Observation After Surgery in Treating Women With Estrogen Receptor Positive or Progesterone Receptor Positive Ductal Carcinoma In Situ of the Breast Who Are Receiving Tamoxifen or Anastrozole". Retrieved via AI Analytics 2026-06-25 from https://api.ai-analytics.org/clinical/NCT00077168. Licensed CC0.

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