Topics:
Radiation Oncology • Genitourinary Cancers
How would you approach definitive prostate radiation in a patient with evidence of seminal vesicle invasion on MRI, but with adjacent small bowel?
For example, in a patient with prior colectomy. Would you consider using a spacer?
Answer from: Radiation Oncologist at Academic Institution
This is a situation where I find an HDR boost can be very advantageous. In most patients I have found that the catheters can easily be placed into at least the first 3 cm of the seminal vesicles, often further. The advantage of HDR over LDR is two fold in this scenario. First, one can manipulate the...
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Answer from: Radiation Oncologist at Academic Institution
This is a problem we encounter more often in the post-prostatectomy setting, but occasionally in patients with an intact prostate, too. The major options for displacing the small bowel would include treating with a full bladder, using a rectal balloon or treating prone. A spacer is really intended t...
Comments
Radiation Oncologist at MD Anderson Cancer Center and The University of Texas Medical Branch
I agree with all of the solutions. If prone is bei...
I agree with all of the solutions. If prone is bei...
Answer from: Radiation Oncologist at Community Practice
First I would repeat the CT simulation to confirm that the positioning of the small bowel in relation to the seminal vesicles. If you see that the small bowel positioning varies from one scan to the next, then you can be more comfortable that the same segment of bowel will not sitting adjacent...