Observational Study on the Efficacy and Safety of Accelerated Partial Breast Irradiation after Breast-Conserving Surgery

Observational Study on the Efficacy and Safety of Accelerated Partial Breast Irradiation after Breast-Conserving Surgery - Observational Study of Accelerated Partial Breast Irradiation

Status

Recruiting

Phases

Unknown

Study type

Observational

Source

JPRN

Registry ID

JPRN-UMIN000059883

Enrollment

180

Registered

2025-11-26

Start date

2025-07-16

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Breast cancer

Interventions

None listed

Eligibility

Sex/Gender

Female

Inclusion criteria

Inclusion criteria: Invasive breast cancer: Tumor size 3cm or less No lymphnode metastasis No lymphovascular invasion Negative surgical margins Ductal carcinoma in situ: Tumor size 3cm or less Negative surgical margins

Exclusion criteria

Exclusion criteria: Invasive lobular carcinoma Known pathogenic variants in breast cancer susceptibility genes (BRCA) 1/2

Design outcomes

Primary

Measure	Time frame
Proportion of adverse events occurrence	—

Secondary

Measure	Time frame
Local recurrence-free survival Overall survival Cosmetic outcomes	—

Countries

Japan

Contacts

Public ContactSatoshi Ishikura

St. Luke's International University, St. Luke's International Hospital Department of Radiation Oncology

sishikur-ncche@umin.ac.jp03-5550-7006

Outcome results