# The Differential Impact of Proton Beam Irradiation Versus Conventional Radiation on Organs-at-risk in Stage II-III Breast Cancer Patients

> **NCT03270072** · — · ACTIVE_NOT_RECRUITING · sponsor: **Massachusetts General Hospital** · enrollment: 100 (estimated)

## Conditions studied

- Breast Cancer Stage II
- Breast Cancer Stage III

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT03270072
- **Lead sponsor:** Massachusetts General Hospital
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** ACTIVE_NOT_RECRUITING
- **Start date:** 2017-10-26
- **Primary completion:** 2024-12-31
- **Final completion:** 2026-12-31
- **Target enrollment:** 100 (ESTIMATED)
- **Last updated:** 2026-03-31


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT03270072

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT03270072, "The Differential Impact of Proton Beam Irradiation Versus Conventional Radiation on Organs-at-risk in Stage II-III Breast Cancer Patients". Retrieved via AI Analytics 2026-05-26 from https://api.ai-analytics.org/clinical/NCT03270072. Licensed CC0.

---

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