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Multicenter study to characterize the molecular genetic features of exceptional response to radiotherapy

Multicenter study to characterize the molecular genetic features of exceptional response to radiotherapy - Multicenter study on exceptional response to radiotherapy

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
JPRN
Registry ID
JPRN-UMIN000049867
Enrollment
50
Registered
2022-12-22
Start date
2023-01-10
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

Cancers treated with radiotherapy

Interventions

None listed

Sponsors

National Cancer Center
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: Patients who meet all of the following criteria 1) to 5) 1) Cancer patients who received radiotherapy at the collaborating institutions between January 2012 and March 2022. 2) Patients who showed an exceptional response to radiotherapy that deviated from the expected radiation dose-effect relationship. 3) Patients who did not receive any drugs to reduce the size of the cancer during radiotherapy. 4) Patients who are 20 years of age or older at the time of radiotherapy. 5) Patients with one or more of the following existing samples available for genetic analysis or histopathological evaluation: A) Excess tumor tissue samples collected for diagnosis. B) Surplus tumor tissue samples obtained at surgery. C) Excess tumor tissue samples stored in the biobank of each institution, for which consent for the use of biobank samples has been obtained from the patient.

Exclusion criteria

Exclusion criteria: 1) Patients with a history of prior radiotherapy for lesions exhibiting exceptional response. 2) Patients unsuitable for the study judged by the principal investigator.

Design outcomes

Primary

MeasureTime frame
Identification of genetic alterations in tumor tissues such as somatic mutations, copy number alterations, aberrant expression, and structural variants

Secondary

MeasureTime frame
Altered gene pathways, tumor immune response, germline mutations, overall survival, progression-free survival, local progression-free survival, duration of response

Countries

Japan

Contacts

Public ContactHidenari Hirata

National Cancer Center Hospital East, Department of Radiation Oncology

exceptional-responder-jimukyoku@east.ncc.go.jp04-7133-1111

Outcome results

None listed

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