Addition of a Focal Boost in External Beam Radiotherapy for Locally Advanced Prostate Cancer by Online Adaptive MR-guided Radiotherapy

NCT ID: NCT05373316

Last Updated: 2022-11-07

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

NOT_YET_RECRUITING

Clinical Phase

PHASE2

Total Enrollment

95 participants

Study Classification

INTERVENTIONAL

Study Start Date

2022-12-01

Study Completion Date

2029-07-01

Brief Summary

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The AFFIRM trial tests the safety and clinical feasibility of MR-guided hypofractionated focal boost radiotherapy for patients with locally advanced prostate cancer. External beam radiotherapy combined with androgen deprivation therapy is considered as the treatment of choice for patients with locally advanced non-metastatic prostate cancer with seminal vesicle invasion.The long-term results of the multicentre phase III study (FLAME trial) showed that addition of an isotoxic focal boost to the intraprostatic lesion improves biochemical disease free survival in intermediate to high-risk patients without impacting toxicity and quality of life.

This focal boost strategy is now proven for a conventional fractionation scheme (35 fractions). The current trend in radiotherapy for prostate cancer is (extreme) hypofractionation, reducing the number of fractions. For locally advanced prostate cancer, however, the data on extreme hypofractionation are scarce.

Detailed Description

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Conditions

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Prostate Cancer Prostate Neoplasm

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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MR-guided hypofractionated focal boost radiotherapy

External beam MR-guided (MR-linac) radiotherapy to the prostate and seminal vesicles of 5x7Gy (once weekly) with an isotoxic integrated focal boost up to 50Gy to the intraprostatic tumor as visible on multiparametric MR

Group Type EXPERIMENTAL

Ultrahypofractionated MR-guided radiotherapy boost

Intervention Type RADIATION

External beam MR-guided (MR-linac) radiotherapy to the prostate and seminal vesicles of 5x7Gy (once weekly) with an isotoxic integrated focal boost up to 50Gy to the intraprostatic tumor as visible on multiparametric MRI.

Interventions

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Ultrahypofractionated MR-guided radiotherapy boost

External beam MR-guided (MR-linac) radiotherapy to the prostate and seminal vesicles of 5x7Gy (once weekly) with an isotoxic integrated focal boost up to 50Gy to the intraprostatic tumor as visible on multiparametric MRI.

Intervention Type RADIATION

Eligibility Criteria

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Inclusion Criteria

* Men aged 18 years or older with histologically proven prostate carcinoma
* Imaging stage T3b (as defined on mpMRI) N0M0
* Intraprostatic lesion visible on MRI
* Capable of giving informed consent

Exclusion Criteria

* History of radiotherapy to the pelvis or transurethral resection of the prostate (TURP)
* Contraindications for MRI according to the guidelines of the local department of Radiology, inability to lay on a treatment table for 45-60 minutes or severe claustrophobia
* Absence of pre-treatment PSMA PET CT
* WHO performance score \> 2
* International Prostate Symptom Score ≥ 15
* PSA \> 30
* Prostate volume \>100c
Minimum Eligible Age

18 Years

Maximum Eligible Age

100 Years

Eligible Sex

MALE

Accepts Healthy Volunteers

No

Sponsors

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Radboud University Medical Center

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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Radboudumc

Nijmegen, Gelderland, Netherlands

Site Status

Netherlands Cancer Institute

Amsterdam, North Holland, Netherlands

Site Status

Countries

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Netherlands

Central Contacts

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Casper Reijnen, MD, PhD

Role: CONTACT

003124 361 4505

Linda Kerkmeijer, MD, PhD

Role: CONTACT

003124 361 4505

Facility Contacts

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Linda Kerkmeijer, MD, PhD

Role: primary

+31243614505

Casper Reijnen, MD, PhD

Role: backup

+31243614505

Floris Pos, MD, PhD

Role: primary

+31205129111

Other Identifiers

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NL79869.091.22

Identifier Type: -

Identifier Source: org_study_id

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