A Prospective Longitudinal Observational Study of Clinical Outcomes, Adverse Events, and Secondary Malignancies After Definitive Radiotherapy for Breast Cancer Patients

A Prospective Longitudinal Observational Study of Clinical Outcomes, Adverse Events, and Secondary Malignancies After Definitive Radiotherapy for Breast Cancer Patients - Longitudinal Observational Study after Definitive Radiotherapy for Breast Cancer (TOKYO Database)

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

JPRN

Registry ID

JPRN-UMIN000034530

Enrollment

4000

Registered

2018-10-27

Start date

1978-12-02

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: All patients with invasive carcinoma/ductal carcinoma in situ/lobular carcinoma in situ of the breast whose primary therapy includes definitive radiation therapy in participating institutions

Exclusion criteria

Exclusion criteria: Patients with metastasis at diagnosis

Design outcomes

Primary

Measure	Time frame
Survival data (Breast cancer specific death/Death from any cause) Recurrence data (Loco-regional relapse/Distant metastasis)	—

Secondary

Measure	Time frame
Contralateral breast cancer (Synchronous/Metachronous breast cancer) Secondary malignancies (non-breast malignant disease) Adverse events (treatment-related/non-treatment-related) Any other clinically meaningful events	—

Countries

Japan

Contacts

Public ContactKenshiro Shiraishi

The University of Tokyo Hospital Department of Radiology

kshiraishi-tky@umin.ac.jp03-3815-5411

Outcome results