# Phase II Protocol of Proton Therapy for Partial Breast Irradiation in Early Stage Breast Cancer

> **NCT01766297** · PHASE2 · RECRUITING · sponsor: **Proton Collaborative Group** · enrollment: 132 (estimated)

## Conditions studied

- Breast Cancer
- Breast Neoplasm
- Breast Tumor
- Cancer of the Breast

## Interventions

- **RADIATION:** Proton Radiotherapy

## Key facts

- **NCT ID:** NCT01766297
- **Lead sponsor:** Proton Collaborative Group
- **Sponsor class:** NETWORK
- **Phase:** PHASE2
- **Study type:** INTERVENTIONAL
- **Status:** RECRUITING
- **Start date:** 2013-02
- **Primary completion:** 2027-01
- **Final completion:** 2035-01
- **Target enrollment:** 132 (ESTIMATED)
- **Last updated:** 2025-09-09


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT01766297

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT01766297, "Phase II Protocol of Proton Therapy for Partial Breast Irradiation in Early Stage Breast Cancer". Retrieved via AI Analytics 2026-06-26 from https://api.ai-analytics.org/clinical/NCT01766297. Licensed CC0.

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