Single Fractions SBRT for Prostate Cancer

NCT ID: NCT04004312

Last Updated: 2025-06-25

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

RECRUITING

Clinical Phase

NA

Total Enrollment

12 participants

Study Classification

INTERVENTIONAL

Study Start Date

2018-11-07

Study Completion Date

2027-12-20

Brief Summary

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It is a phase I study of radical hypofractionation delivering one single fraction of SBRT in patients with low- and favorable intermediate-risk prostate cancer that will undergo placement of the SpaceOAR hydrogel prior to treatment.

Our hypothesis is that treatments can be safely delivered in one single fraction using SBRT provided the separation between the prostate and rectum is increased using the hydrogel

Detailed Description

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There is a pre-treatment visit to the radiation oncology department. A gel is injected between the prostate and the rectum. This procedure is done with the use of a transrectal ultrasound, similarly to the prostate biopsy the patient had. A local anesthetic will be applied to numb the skin and to the underneath tissue where the injection will be performed. The procedure itself will take approximately 20 minutes and after a short observation time, the patient returns home.

The next visit (approximately after 7 days after the insertion of the gel), a CT scan and MRI-scan will be done. Prior to the scans, a urinary catheter will be inserted in the bladder through the penis, and removed once the scans are done. Using these images, the doctor and the team involved will perform an individualized planning study to establish the safest way the radiation will enter your body. When the treatment plan is ready, patient is called to receive the single treatment.

A urinary catheter again will be inserted in the bladder and the patient will be directed to the room where your treatment will be delivered. The treatment should last approximately 30 minutes. After the treatment, the urinary catheter will be removed.

Conditions

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Prostate Cancer

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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Single Fraction SBRT in the treatment of prostate cancer

Prior to treatment, a hydrogel spacer will be inserted between the recutm and prostate. A urinary catheter will also be inserted in the bladder. A single dose of 19Gy will be delivered with an IMRT technique. The treatment should last approximately 30 minutes. After the treatment, the urinary catheter will be removed.

Group Type EXPERIMENTAL

Stereotactic Body Radiation Therapy (SBRT)

Intervention Type RADIATION

Shorter radiation therapy means that a higher dose will be offered. To limit side effects of exposure to a high dose, a medical device protecting the rectum will be used. The medical device to be used is called SpaceOAR hydrogel (device). The SpaceOAR hydrogel creates space between the rectum and the prostate, making it much less likely that the rectum is exposed to radiation. It is injected into place prior to the start of radiation treatment using a needle. Patients may be awake or asleep under local anesthesia for the procedure. SpaceOAR hydrogel is not painful, it remains stable during radiation therapy and then is gradually absorbed by the body over the course of approximately six months, once radiation therapy has been completed.

Interventions

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Stereotactic Body Radiation Therapy (SBRT)

Shorter radiation therapy means that a higher dose will be offered. To limit side effects of exposure to a high dose, a medical device protecting the rectum will be used. The medical device to be used is called SpaceOAR hydrogel (device). The SpaceOAR hydrogel creates space between the rectum and the prostate, making it much less likely that the rectum is exposed to radiation. It is injected into place prior to the start of radiation treatment using a needle. Patients may be awake or asleep under local anesthesia for the procedure. SpaceOAR hydrogel is not painful, it remains stable during radiation therapy and then is gradually absorbed by the body over the course of approximately six months, once radiation therapy has been completed.

Intervention Type RADIATION

Other Intervention Names

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Space OAR Gel

Eligibility Criteria

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Inclusion Criteria

Histologically proven adenocarcinoma of the prostate. Tl-2b (AJCC 7th edition) Gleason score 6 or 7 (3+4)) or Gleason 7(4+3) and recent PSA \< 10 (less than 30 days; must obtained \>90 days from stopping dutasteride or \>30 days from stopping finasteride)

Recent PSA under 15 ng/dL (less than 30 days; must obtained \>90 days from stopping dutasteride or \>30 days from stopping finasteride) OR Gleason 7(4+3) and recent PSA \< 10 (less than 30 days; must obtained \>90 days from stopping dutasteride or \>30 days from stopping finasteride)

International Prostate Symptom Score \<16 Prostate gland volume\< 80cc

Zubrod Performance Status 0-1 within 60 days prior to registration

Age \>: 18

Patient must be able to provide study-specific informed consent prior to study entry.

Exclusion Criteria

Patients who opt to receive another treatment modality, such as surgery, or undergo active surveillance.

Prior or concurrent invasive malignancy (except non-melanomatous skin cancer) or lymphomatous/hematogenous malignancy unless continually disease free for a minimum of 5 years. All patients with in situ carcinoma are eligible for this study (for example, carcinoma in situ of the oral cavity) except patients with carcinoma of the bladder (including in situ bladder cancer or superficial bladder cancer).

Evidence of distant metastases

Regional lymph node involvement

Previous radical surgery (prostatectomy), cryosurgery, or HIFU for prostate cancer Previous pelvic irradiation, prostate brachytherapy, or bilateral orchiectomy Previous hormonal therapy, such as LHRH agonists or antagonists, anti-androgens, estrogens, or surgical castration (orchiectomy)

Use of finasteride within 30 days prior to registration. PSA should not be obtained prior to 30 days after stopping finasteride.

Use of dutasteride within 90 days prior to registration. PSA should not be obtained prior to 90 days after stopping dutasteride.

Previous or concurrent cytotoxic chemotherapy for prostate cancer Severe, active co-morbidity, defined as follows:

Unstable angina and/or congestive heart failure requiring hospitalization within the last 6 months

Transmural myocardial infarction within the last 6 months

Acute bacterial or fungal infection requiring intravenous antibiotics at the time of registration

Chronic obstructive pulmonary disease exacerbation or other respiratory illness requiring hospitalization or precluding study therapy at the time of registration

Hepatic insufficiency resulting in clinical jaundice and/or coagulation defects; note, however, that laboratory tests for liver function and coagulation parameters are not required for entry into this protocol. (Patients on Coumadin or other blood thinning agents are eligible for this study.)

Acquired Immune Deficiency Syndrome (AIDS) based upon current CDC definition; note, however, that HIV testing is not required for entry into this protocol. The need to exclude patients with AIDS from this protocol is necessary because the treatments involved in this protocol may be significantly immunosuppressive. Protocol-specific requirements may also exclude immuno-compromised patients.
Minimum Eligible Age

18 Years

Eligible Sex

MALE

Accepts Healthy Volunteers

No

Sponsors

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Boston Scientific Corporation

INDUSTRY

Sponsor Role collaborator

Fabio Cury

OTHER

Sponsor Role lead

Responsible Party

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Fabio Cury

Principal Investigator

Responsibility Role SPONSOR_INVESTIGATOR

Principal Investigators

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Fabio Cury, MD

Role: PRINCIPAL_INVESTIGATOR

McGill University Health Centre- Cedars Cancer Centre

Locations

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McGill University Health Centre-Cedars Cancer Centre

Montreal, Quebec, Canada

Site Status RECRUITING

Countries

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Canada

Central Contacts

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Marianna Perna

Role: CONTACT

514-934-1934 ext. 43191

Tatiana Carvalho

Role: CONTACT

514-934-1934 ext. 43698

Facility Contacts

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Marianna Perna

Role: primary

514-934-1934 ext. 43191

Tatiana Carvalho

Role: backup

514-934-1934 ext. 43698

References

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Other Identifiers

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2019-4650

Identifier Type: -

Identifier Source: org_study_id

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