# Intraoperative radiation for breast-conserving surgery

Source: https://onco.cc/trials/nct01570998/  
OnCo record `nct01570998` (Trial). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

This study evaluates radiation delivered during breast surgery. It follows side effects and cancer outcomes to assess this approach.

## Summary

This study evaluates radiation delivered during breast surgery. It follows side effects and cancer outcomes to assess this approach.

Interventional study registered as NCT01570998, sponsored by University of California, San Francisco. No drug-development phase applies in the structured registry record. Registry enrollment is 1,259 participants (actual). Registry status checked October 10, 2026: active not recruiting. UCSF lists this study as closed to local enrollment; local availability and overall registry status are separate. See the registry for full eligibility and current sites. The registry narrative calls this phase IV, but its structured phase field is NA; this record preserves the structured value rather than inferring a drug phase.

## Fields

- Kind: Trial
- Status: active
- Last checked: 2026-10-10
- Also known as: Intraoperative Radiation Therapy in Treating Patients With Breast Cancer Undergoing Breast-Conserving Surgery
- Tags: ucsf-breast-coverage; interventional
- Registry id: NCT01570998
- Phase: not-applicable
- Setting: Breast cancer treated with breast-conserving surgery
- Sponsor: University of California, San Francisco
- Enrolled: 1259

## Sources

- ClinicalTrials.gov NCT01570998: https://clinicaltrials.gov/study/NCT01570998
- UCSF study listing and local availability: https://clinicaltrials.ucsf.edu/trial/NCT01570998

## Connected records

- cancers: [Breast cancer (all types)](https://onco.cc/cancers/breast-cancer/)
- institutions: [UCSF Helen Diller Family Comprehensive Cancer Center](https://onco.cc/institutions/ucsf/)

---
JSON: https://onco.cc/api/v1/entities/nct01570998.json