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Feasibility study of re-irradiation planning in definitive radiotherapy using the simultaneous integrated boost (SIB) technique for prostate cancer with pelvic lymph node metastases

Feasibility study of re-irradiation planning in definitive radiotherapy using the simultaneous integrated boost (SIB) technique for prostate cancer with pelvic lymph node metastases

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCT1030250284
Enrollment
20
Registered
2025-08-06
Start date
2025-08-06
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

definitive radiation therapy using simultaneous integrated boost

Sponsors

Murofushi Keiko
Lead Sponsor

Eligibility

Sex/Gender
Male

Inclusion criteria

Inclusion criteria: Patients receiving definitive radiotherapy for prostate cancer, regardless of the use of SpaceOAR. Diagnosis: Histologically confirmed diagnosis of prostate cancer. Lymph Node Involvement: Presence of pelvic lymph node metastasis confirmed by CT or MRI. Pelvic lymph nodes are defined as those in the internal iliac, external iliac, obturator, or presacral regions. Distant Metastases: No evidence of extrapelvic lymph node metastasis or visceral metastasis as confirmed by CT, PET/CT, or whole-body MRI. Bone Metastases: No evidence of bone metastasis based on either bone scintigraphy or whole-body MRI. Hormonal Therapy: Ongoing androgen deprivation therapy (ADT) for >=6 months at the time of radiotherapy initiation. - Exceptions: Patients diagnosed with castration-resistant prostate cancer or deemed unsuitable for hormonal therapy by the attending urologist may be included even if the duration of ADT is <6 months or if ADT has not been administered. - Radiotherapy initiation within 12 months of ADT initiation is recommended, but patients exceeding this period are still eligible. Performance Status: ECOG performance status of 0 or 1. Informed Consent: Written informed consent must be obtained from the patient prior to enrollment, following adequate explanation of the study.

Exclusion criteria

Exclusion criteria: a) Prior surgery for prostate cancer b) History of pelvic radiotherapy c) Active concurrent malignancies d) Active collagen vascular disease e) Uncontrolled diabetes mellitus f) Considered unsuitable for participation at the discretion of the principal investigator

Design outcomes

Primary

MeasureTime frame
Re-planning Rate

Secondary

MeasureTime frame
Incidence of late adverse events at 2 year after radiotherapy Incidence of acute adverse events 2-year biochemical recurrence rate

Contacts

Public ContactShota Minakami

Tokyo Metropolitan Hospital Organization Tokyo Metropolitan Bokutoh Hospital

min_shota@yahoo.co.jp+81-3-3633-5511

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026