Endorectal balloons in the post prostatectomy setting: Do gains in stability lead to more predictable dosimetry?

Application of rectal retractor for postprostatectomy salvage radiotherapy of prostate cancer: A case report and literature review

“…Recently, Streller et al investigated the effect of an ERB on anorectal doses in postprostatectomy salvage volumetric‐modulated arc therapy that the application of an ERB did not result in a significant reduction of anorectal doses . Also, other reports on effect of an ERB in postoperative RT for prostate cancer showed that the ERB application led to an improvement in the anal wall doses and geometric reproducibility of the CTV, rectum, and bladder, but the dosimetric stability of the rectum with ERBs were controversial, which can be attributed to pushing anterior rectal wall toward the prostate bed by ERBs . Missing counterfort of the prostate gland in the postoperative setting results in pushing anterior rectal wall into the treatment field by using an ERB more than the definitive prostate RT with an ERB.…”

Superior target volume and organ stability with the use of endorectal balloons in post‐prostatectomy radiotherapy

“…also confirmed this finding . Dosimetric impact of ERB during treatment has recently been published by our group . Although no statistically significant dosimetric improvement was seen in ERB patients using the same CTV to PTV margins in both cohorts, we postulate that a larger study analysing both inter and intrafraction motion may reveal dosimetric improvement with the ERB.…”

“…The endorectal balloon (ERB) is a potential solution to stability issues. Its use is well documented in definitive prostate radiotherapy; however, little is reported about its use in the post‐prostatectomy setting . We hypothesised that the use of ERBs would increase rectal, and hence posterior CTV border stability.…”

Post-Prostatectomy Image-Guided Radiotherapy: The Invisible Target Concept

“…ERB also reduced the impact of vesicle filling on shift agreement (59). Jameson et al analyzed the use of ERB on post-prostatectomy patients and observed no significant dosimetry improvements in terms of PTV coverage or OAR sparing with the use of ERB (60). On the other hand, some dosimetry studies have demonstrated an improvement in rectum and anal canal sparing, mainly for intermediate and high doses, with the use of ERB.…”