Radiotherapy to the Prostate and Dominant Intra-Prostatic Lesion (DIL)

September 29, 2025 updated by: Memorial Sloan Kettering Cancer Center

A Phase I Feasibility Study of Radiotherapy to the Prostate and Dominant Intra-Prostatic Lesion (DIL) Using Ultra-Hypofractionated, MR Image-Guided, Intensity-Modulated Radiotherapy

The purpose of the study is to find out the feasibility and effects of ultra-hypofractionated radiotherapy to the prostate and dominant lesion as definitive treatment for intermediate risk prostrate cancer.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Active, not recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
35

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • New Jersey
      • Basking Ridge, New Jersey, United States, 07920
        • Memorial Sloan Kettering Basking Ridge (Consent only and follow up)
      • Middletown, New Jersey, United States, 07748
        • Memorial Sloan Kettering Monmouth
      • Montvale, New Jersey, United States, 07645
        • Memorial Sloan Kettering Bergen
    • New York
      • Commack, New York, United States, 11725
        • Memorial Sloan Kettering Commack
      • Harrison, New York, United States, 10604
        • Memorial Sloan Kettering Westchester
      • New York, New York, United States, 10065
        • Memorial Sloan Kettering Cancer Center
      • Uniondale, New York, United States, 11553
        • Memorial Sloan Kettering Nassau (Consent and follow up)

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Intermediate risk prostate cancer patients will be eligible for this study. Risk groups will be assigned as per NCCN guidelines. Intermediate risk patients will be defined as:

    • PSA 10-20 ng/ml or
    • Gleason score = 7 or
    • Clinical stage T2b/T2c

  • Additionally, patients will be required to meet the following criteria:

    • Age >18
    • KPS > 80
    • Prostate size < 60cc
    • Presence of a prostatic lesion with maximum dimension of >/= 0.5cm and no more than two additional disease foci, each with a maximum dimension less than that of the dominant lesion.
    • International Prostrate Symptom Score < 15
    • Subjects must fill out the standard MRI screening form and satisfy all MRI screening criteria

Exclusion Criteria:

  • Prior androgen deprivation therapy for prostate cancer
  • Evidence of metastatic disease on bone scan or MRI/CT
  • MRI ineligibility due to the presence of a cardiac pacemaker, defibrillator or other implanted metallic or electronic device which is considered MR unsafe, severe claustrophobia or inability to lie flat for the duration of the study, etc.
  • Metallic hip implant, metallic implant or device in the pelvis that might distort the local magnetic field and compromise quality of MP-MRI.
  • Lateral pelvic separation greater than 50 cm and/or anterior-posterior separation greater than 35 cm which are incompatible with MRCAT reconstruction
  • Contra-indications to receiving gadolinium contrast
  • KPS < 80
  • Pelvic MRI or CT (MRI preferred) evidence of radiographic T3, T4 or N1 disease.
  • Prior history of transurethral resection of the prostate
  • Prior history of chronic prostatitis
  • Prior history of urethral stricture
  • Prior history of pelvic irradiation
  • History of inflammatory bowel disease
  • Unable to give informed consent
  • Unable to complete quality of life questionnaires

  • Abnormal complete blood count. Any of the following

    • Platelet count less than 75,000/ml
    • Hb level less than 10 gm/dl
    • WBC less than 3.5/ml
  • Abnormal renal function tests (creatinine > 1.5)

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: MR Image Guided, Intensity-Modulated Radiotherapy
Patients enrolled in this study will undergo MR-based, image-guided, intensity-modulated radiotherapy using similar equipment, techniques, and treatment-planning procedures as currently practiced at MSKCC.
Radiation: MR-based image-guided, intensity-modulated radiotherapy
Patients will receive a standard dose of 8 Gy/fraction for five fractions for a total dose of 40 Gy to the prostate with a simultaneously delivered boost of 9 Gy for five fractions (clinically non-standard dose of 45 Gy total) to a single dominant lesion with a maximum dimension of at least 0.5 cm as determined on pre-treatment diagnostic T2 MRI imaging.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Treatment related toxicity of ultra-hypofractionated radiotherapy will be assessed according to NCI CTCAE v3.0 gastrointestinal or genitourinary toxicity
Time Frame: 36 months
Assess toxicity of ultra-hypofractionated radiotherapy to the prostate and dominant lesion as definitive treatment for intermediate risk prostate cancer. Severe Toxicity will be assessed and defined as Grade 3 or higher NCI CTCAE v3.0 gastrointestinal or genitourinary toxicity
36 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Memorial Sloan Kettering Cancer Center

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Daniel Gorovets, MD, Memorial Sloan Kettering Cancer Center

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
August 28, 2017

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
August 28, 2026

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
August 28, 2026

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
August 29, 2017

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
August 30, 2017

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
August 31, 2017

Study Record Updates

Last Update Posted (Estimated)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
September 30, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 29, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
September 1, 2025

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 17-407

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

Yes

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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