Prostate Cancer Clinical Trial
Official title:
Circulating Tumor Cells in Patients Undergoing Stereotactic Body Radiotherapy for Low- and Intermediate-Risk Prostate Cancer
The purpose of this study is to determine if a non-invasive cancer treatment, high-dose stereotactic body radiotherapy (SBRT), is associated with changes in circulating tumor cells counts in patients with low- and intermediate-risk prostate cancer.
SBRT (stereotactic body radiotherapy) may decrease or actually increase CTC levels in
patients with cancer, and knowledge about the effects of different therapies, including SBRT,
on CTC levels will be of general interest to the oncology community. Patients will undergo
blood draws at defined times as indicated below.
1. Prior to CT-simulation, but more than 2 days after digital rectal examination
2. Within 24 hours following CT simulation (an endorectal balloon is used at the time of
simulation)
3. Within 24 hours following the first treatment
4. Within 24 hours following the third treatment
5. Within 1 week following the fifth treatment
;
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