Safety and Efficacy of Fiducial Marker and Hydrogel Spacer Placement in Carbon-Ion Radiotherapy for Prostate Cancer

Safety and Efficacy of Fiducial Marker and Hydrogel Spacer Placement in Carbon-Ion Radiotherapy for Prostate Cancer - Safety and Efficacy of Fiducial Marker and Hydrogel Spacer Placement in Carbon-Ion Radiotherapy for Prostate Cancer

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

JPRN

Registry ID

JPRN-UMIN000060067

Enrollment

2500

Registered

2025-12-12

Start date

2025-10-10

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

prostate cancer

Interventions

None listed

Eligibility

Sex/Gender

Male

Inclusion criteria

Inclusion criteria: Patients who underwent carbon-ion radiotherapy for prostate cancer at our institution between April 2018 and August 2025

Exclusion criteria

Exclusion criteria: Cases in which the patient or their representative refused the use of data for this study. Cases with incomplete or missing data.

Design outcomes

Primary

Measure	Time frame
Acute and late adverse events	—

Secondary

Measure	Time frame
5-year biochemical recurrence-free survival and 5-year overall survival	—

Countries

Japan

Contacts

Public ContactAtsushi Okato

National Institutes for Quantum Science and Technology, QST Hospital Radiation Oncology Section

okato.atsushi@qst.go.jp043-206-3306

Outcome results