Highly Conformal, Hypofractionated, Focally Dose Escalated Post-Prostatectomy Radiotherapy
|The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details.|
|ClinicalTrials.gov Identifier: NCT03388619|
Recruitment Status : Recruiting
First Posted : January 3, 2018
Last Update Posted : September 5, 2021
Sometimes prostate cancer comes back after a person s prostate is removed. In this case, radiation is a common treatment. Radiation kills prostate cancer cells. It can be very effective. It is usually given in short doses almost every day for 6 or 7 weeks. Researchers want to see if a shorter schedule can be as effective. They want to see if that causes the same or fewer side effects. Usually, radiation is used to treat the entire area where the prostate was before surgery. In some patients, an area of tumor can be seen on scans. Researchers are also trying to see if they can give less dose to the area usually treated with radiation if the full dose is given to the tumor seen on scans.
To find the shortest radiation schedule that people can tolerate without strong side effects.
People at least 18 years old who have had a prostatectomy and will get radiation
Participants will be screened with:
- Medical history
- Physical exam
- Blood and urine tests
- Scan that uses a small amount of radiation to make a picture of the body
- Scan that uses a magnetic field to make an image of the body
- Participants will provide documents that confirm their diagnosis.
- Participants may have a scan of the abdomen and pelvis.
Before they start treatment, participants will have another physical exam and blood tests.
Participants will get radiation each day Monday through Friday. Treatment may last 2, 3, or 4 weeks.
Participants may provide a tissue sample from a previous procedure for research.
Participants will answer questions about their general well-being and function.
About 4-5 weeks after they finish radiation treatment, participants will have a follow-up visit. They will be examined and give a blood sample. They will have 6 follow-up visits for the next 2 years.
|Condition or disease||Intervention/treatment||Phase|
|Cancer Of Prostate Prostate Neoplasms Prostate Cancer Neoplasms of Prostate Prostatic Cancer||Radiation: Dose to prostate bed with integrated boost Radiation: Dose to prostate bed irradiation only||Phase 1|
Prostate cancer that recurs after prostatectomy (rising PSA) with no evidence of metastatic disease is often treated with radiation to the entire prostate bed to a dose of 66-72 Gy over 6-7 weeks. This treatment can provide PSA control in approximately 75% of patients, but may have associated genitourinary and gastrointestinal toxicity due to irradiation of the rectum, small bowel, and bladder. Imaging of prostate cancer has improved to the extent that recurrent disease is often identified in the prostate bed or in other pelvic sites. The current standard is to irradiate the entire prostate bed to the total dose. This trial will test the tolerability of accelerated treatment designed to yield a similar rate of late toxicity. In addition, in patients with visible tumor, it will test the feasibility of delivering a lower dose to the prostate bed and an integrated boost (simultaneous) to the visible tumor to allow a higher dose to visible tumor than can be delivered with standard approaches.
- Define the maximum tolerated dose (MTD) hypofractionation of image guided, focally dose escalated post-prostatectomy radiation.
- PSA recurrence after prostatectomy or indications for adjuvant radiation after prostatectomy.
- No evidence of distant metastases of prostate cancer (pelvic lymph nodes are allowed).
- Age greater than or equal to 18 years old
- ECOG performance status less than or equal to 1
This is a Phase I trial of hypofractionated, focal dose escalation with reduced dose prostate bed irradiation using image and pathologic guidance. The prostate bed will be treated with hypofractionated radiation and areas in the prostate bed or pelvis shown to have tumor on biopsy or with advanced imaging studies will be treated with an integrated boost to visible tumor. The treatment duration will be decreased sequentially in three Dose Level groups. Quality of life and functional outcomes such as urine, bowel, and erectile function will be assessed with questionnaires. A maximum of 48 patients will be enrolled.
|Study Type :||Interventional (Clinical Trial)|
|Estimated Enrollment :||48 participants|
|Intervention Model:||Sequential Assignment|
|Masking:||None (Open Label)|
|Official Title:||A Phase I Trial of Highly Conformal, Hypofractionated, Focally Dose Escalated Post-Prostatectomy Radiotherapy|
|Actual Study Start Date :||January 17, 2018|
|Estimated Primary Completion Date :||July 1, 2025|
|Estimated Study Completion Date :||December 31, 2025|
Experimental: 1/Prostate bed with integrated boost
Dose to prostate bed with integrated boost
Radiation: Dose to prostate bed with integrated boost
Radiation will be delivered at an escalated dose to areas of recurrent prostate cancer identified on imaging and a reduced dose will be delivered to the entire prostate bed
Experimental: 2/Prostate bed irradiation only
Dose to prostate bed irradiation only
Radiation: Dose to prostate bed irradiation only
Radiation will be delivered to the prostate bed only
- Define the maximum tolerated dose (MTD) [ Time Frame: 3 weeks after radiation ]Define the maximum tolerated dose (MTD) of image guided hypofractionated, focally dose escalated post-prostatectomy radiation.
- The rate of PSA control [ Time Frame: 1 and 2 years after treatment ]Kaplan-Meier survival analysis and effects of clinical variables on bPFS will be assessed by the Cox proportional hazards model.
- Proportion of patients that have improvement in quality of life after treatment [ Time Frame: 1 and 2 years after treatment ]The quality of life scores will be summarized at baseline and for each visit. Linear mixed effects model will be used to model quality of life scores at baseline and during and after treatment in which random intercept and random slope are used to account for patient-specific trajectory of quality of life scores.
- List of adverse event frequency [ Time Frame: 3 weeks after radiation ]Define the toxicity profile of image-guided, focally dose escalated prostate bed radiation in patients with a local or regional recurrence of prostate cancer after prostatectomy.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03388619
|Contact: Theresa Cooley-Zgela, R.N.||(301) firstname.lastname@example.org|
|United States, Maryland|
|National Institutes of Health Clinical Center||Recruiting|
|Bethesda, Maryland, United States, 20892|
|Contact: For more information at the NIH Clinical Center contact National Cancer Institute Referral Office 888-624-1937|
|Principal Investigator:||Deborah E Citrin, M.D.||National Cancer Institute (NCI)|