A Study of MRI-guided High-dose Radiation Therapy in Prostate Cancer

Description

One of the usual approaches to treating intermediate-risk prostate cancer is a type of radiation therapy called SBRT (stereotactic body radiation therapy). SBRT delivers higher than standard doses of radiation over a lower number of treatment sessions. However, there is a 20% chance that intermediate-risk prostate cancer will come back after this treatment. The purpose of this study is to find out whether giving an even higher dose (a "boost" dose) of radiation directly to the main tumor and the standard dose of radiation to the rest of the prostate may cure the cancer or prevent it from coming back for a longer period of time while causing few side effects.

Conditions

Prostate Cancer

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Study Overview

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Study Details

Study overview

One of the usual approaches to treating intermediate-risk prostate cancer is a type of radiation therapy called SBRT (stereotactic body radiation therapy). SBRT delivers higher than standard doses of radiation over a lower number of treatment sessions. However, there is a 20% chance that intermediate-risk prostate cancer will come back after this treatment. The purpose of this study is to find out whether giving an even higher dose (a "boost" dose) of radiation directly to the main tumor and the standard dose of radiation to the rest of the prostate may cure the cancer or prevent it from coming back for a longer period of time while causing few side effects.

A Phase II Study of Radiotherapy to the Prostate and Dose Intensification to the Dominant Intra- Prostatic Lesion (DIL) Using Ultra-Hypofractionated, MR-Guided Radiotherapy

A Study of MRI-guided High-dose Radiation Therapy in Prostate Cancer

Condition
Prostate Cancer
Intervention / Treatment

-

Contacts and Locations

Basking Ridge

Victoria Brennan, Basking Ridge, New Jersey, United States, 07920

Middletown

Victoria Brennan, Middletown, New Jersey, United States, 07748

Montvale

Victoria Brennan, Montvale, New Jersey, United States, 07645

Commack

Victoria Brennan, Commack, New York, United States, 11725

Harrison

Victoria Brennan, Harrison, New York, United States, 10604

New York

Memorial Sloan Kettering Cancer Center (All Protocol Activities), New York, New York, United States, 10065

Uniondale

Victoria Brennan, Uniondale, New York, United States, 11553

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.

For general information about clinical research, read Learn About Studies.

Eligibility 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 or
  • * Additionally, patients will be required to meet all of the following criteria:
  • * Age ≥ 18
  • * Karnofsky Performance Status (KPS) ≥ 80 (Appendix 1)
  • * Prostate size ≤ 80 cc
  • * Presence of a T2-visible prostatic lesion with maximum dimension of ≥ 0.5 cm and no more than one additional disease focus
  • * MRI findings: Lesion may contact the capsular edge, possible extracapsular extension (ECE) permitted
  • * International Prostate Symptom Score ≤ 15
  • * Satisfy all MRI screening criteria and be willing to fill out the standard MRI screening form
  • * Gleason score \>7
  • * PSA \>20
  • * Prior or concurrent androgen deprivation therapy for prostate cancer MRI findings: suspicious for/probable ECE
  • * MRI findings: \>2 disease foci identifiable
  • * 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; inability to lie flat for the duration of the study; etc.
  • * 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 or prostate MRI or CT (MRI preferred) evidence of radiographic T3, T4, or N1 disease
  • * Prior history of transurethral resection of the prostate
  • * 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, including 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)

Ages Eligible for Study

18 Years to

Sexes Eligible for Study

MALE

Accepts Healthy Volunteers

No

Collaborators and Investigators

Memorial Sloan Kettering Cancer Center,

Victoria Brennan, MBBCH BAO, PRINCIPAL_INVESTIGATOR, Memorial Sloan Kettering Cancer Center

Study Record Dates

2026-08-04