RT Journal Article SR Electronic T1 Clinical Outcomes of Hydrogel Spacer Injection Space OAR in Men Submitted to Hypofractionated Radiotherapy for Prostate Cancer JF In Vivo JO In Vivo FD International Institute of Anticancer Research SP 3385 OP 3389 DO 10.21873/invivo.12637 VO 35 IS 6 A1 PIETRO PEPE A1 MARIA TAMBURO A1 MICHELE PENNISI A1 DARIO MARLETTA A1 FRANCESCO MARLETTA YR 2021 UL http://iv.iiarjournals.org/content/35/6/3385.abstract AB Background/Aim: To evaluate the clinical outcomes of men with prostate cancer (PCa) submitted to hydrogel spacer injection before hypofractionated radiotherapy (HRT). Patients and Methods: From April 2018 to April 2020, 32 patients with clinically localized PCa underwent hydrogel injection Space OAR before HRT to the prostate and seminal vesicle; the prescription dose was 60 Gy in 20 fractions, 5 days/week over 4 weeks. PSA levels, genitourinary (GU) and gastrointestinal (GI) toxicities, and sexual function were prospectively evaluated. Results: PSA levels at the median follow up of 15 months was 0.52 ng/ml; 28.1% vs. 78.1% patients had GI vs. GU Grade 0 acute toxicity and 93.7% vs. 0% had GI vs. GU Grade 0 late toxicity. Furthermore, 88.1% of patients kept pretreatment sexual potency. Conclusion: The use of the hydrogel Spacer OAR before HRT is useful for reducing acute and late GU and GI toxicities.