ESTRO 2022 - Abstract Book

S682

Abstract book

ESTRO 2022

Figure 1. US-SBRT 3 year EPIC-26 mean urinary domain scores with 95% CI.

Chi-Square test was performed to compare the proportion of patients reporting MCIC between regimens (Table 1). While numerical differences were noted in favour of the SBRT group at 12 and 36 months, no statistically significant differences in MCIC reporting was observed (p>.05).

Conclusion Over 3 years, SBRT+EBRT may have a larger impact on GU hrQoL than SBRT alone due to a higher BED. It is unknown whether the higher BED will also translate to improved disease control. These two regimens are currently being prospectively compared in the TROG 18.01 NINJA randomized clinical trial (ACTRN12618001806257).

OC-0766 Response of local disease at magnetic resonance after salvage radiotherapy for prostate cancer

M. Bottero 1 , A. Faiella 1 , D. Giannarelli 2 , A. Farneti 3 , L. Bertini 4 , V. Landoni 5 , P. Vici 6 , G. Sanguineti 3

1 IRCCS, Regina Elena National Cancer Institute, Radiation Oncology, Rome, Italy; 2 IRCCS, Regina Elena National Cancer Institute, Biostatistics, Rome, Italy; 3 IRCCS Regina Elena National Cancer Institute, Radiation Oncology, Rome, Italy; 4 IRCCS Regina Elena National Cancer Institute, Radiology, Rome, Italy; 5 IRCCS Regina Elena National Cancer Institute, Physics, Rome, Italy; 6 IRCCS Regina Elena National Cancer Institute, Medical Oncology, Rome, Italy Purpose or Objective To assess the pattern of response on dynamic contrast enhancement magnetic resonance imaging (DCE-MRI) of presumed local lesions in the setting of salvage radiotherapy (sRT) after radical prostatectomy (RP).

Materials and Methods