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Clinical Outcomes of Dose-escalated Radiotherapy for Localised Prostate Cancer: A Single-institution Experience.

ABSTRACT: BACKGROUND/AIM:To report the outcomes of patients with prostate cancer treated with dose-escalated radiotherapy over a 15-year period at our Institution. PATIENTS AND METHODS:Patients with biopsy-proven cT1-4N0M0 disease who received radical external beam radiotherapy (EBRT) were reviewed. The endpoints were 5-year overall survival (OS), freedom from biochemical failure (FFBF) and late treatment toxicities. RESULTS:A total of 236 patients were eligible. Median follow-up was 70 months. Low-, intermediate- and high-risk disease was found in 9%; 29% and 62% of patients, respectively. The median radiation dose was 73.8 Gy. Overall 42% of patients had dose escalation to >74 Gy. Five-year OS and FFBF were 95.2%/81.6%/75.4% and 95.0%/98.0%/82.0% for low-/intermediate-/high-risk patients, respectively. Dose escalation to >74 Gy did not improve FFBF (hazard ratio=0.97, 95% confidence intervaI=0.43-2.19, p=0.93) and was associated with a 4.3-fold increase in the odds of grade 3 or more rectal bleeding (p<0.01). CONCLUSION:Dose escalation to >74 Gy did not improve OS or FFBF but was associated with a higher rate of grade 3 or more rectal haemorrhage.

SUBMITTER: Meng K

PROVIDER: S-EPMC7157896 | biostudies-literature | 2020 Mar-Apr

REPOSITORIES: biostudies-literature

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Clinical Outcomes of Dose-escalated Radiotherapy for Localised Prostate Cancer: A Single-institution Experience.

Meng Katherine K Lim Keith K Lee Chia Ching CC Chia David D Ooi Kiat Huat KH Soon Yu Yang YY Tey Jeremy J

In vivo (Athens, Greece) 20200301 2

<h4>Background/aim</h4>To report the outcomes of patients with prostate cancer treated with dose-escalated radiotherapy over a 15-year period at our Institution.<h4>Patients and methods</h4>Patients with biopsy-proven cT1-4N0M0 disease who received radical external beam radiotherapy (EBRT) were reviewed. The endpoints were 5-year overall survival (OS), freedom from biochemical failure (FFBF) and late treatment toxicities.<h4>Results</h4>A total of 236 patients were eligible. Median follow-up was ...[more]

PMID: 32111781

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Project description:BACKGROUND:Desmoid-type fibromatosis is a rare, potentially locally aggressive disease. Herein we present our experience in the treatment with radiotherapy. METHODS AND MATERIALS:In total 40 patients who received 44 treatments from 2009 to 2018 at the Heidelberg University Hospital with photons (N =?28) as well as protons (N =?15) and carbon ions (N =?1) were investigated. The median age at radiotherapy was 41?years [range 8-78]. Familial adenomatous polyposis (FAP) was confirmed for nine patients and 30 had a unifocal desmoid tumor. The localizations were abdominal wall, abdominopelvic cavity, thoracic wall, extremity, head and neck and trunk. The median prescribed dose was 54?Gy/ Gy (RBE) [range 39.6-66, IQR 50-60]. Eleven treatments were performed at the time of first diagnosis; 33 at the time of progression or recurrence. Post-operative radiotherapy was performed in 17 cases. The median planning target volume was 967?ml [84-4364?ml, IQR 447-1988]. Survival analysis was performed by the Kaplan-Meier Method. RESULTS:The median follow-up time was 32?months [1-153]. At the end of the follow-up interval all patients but one were alive. The estimated local progression free survival of the treated lesion in 3 and 5?years was 76.4% and 63,8%, respectively. The progression-free survival in 3 and 5?years was 72.3 and 58.4% and the overall survival was 97.4 and 97.4%, respectively. In case of macroscopic tumor (N =?31) before radiotherapy a partial remission was observed in 12 cases (38.7%) and a complete remission in 4 cases (12.9%). Progression was observed in 13 (29.5%) cases, predominantly at the margin of the planning target volume (PTV, N =?5, 38,4%) followed by progression within the PTV (N =?4, 30.8%). In univariate analysis multifocal localization was associated with impaired progression-free survival (p =?0.013). One patient developed a grade V gastrointestinal bleeding, otherwise no acute toxicity >°III was observed. Late toxicity was depending on the localization of the desmoid tumor and was especially severe in patients with FAP and abdominopelvine desmoids including gastrointesinal fistula, perforation and abscess. CONCLUSION:Radiotherapy in the treatment of desmoids can lead to long term control. Treatment of patients with abdominopelvine desmoids should be avoided, as the risk of higher-grade complications is substantial.

Dataset Information

Clinical Outcomes of Dose-escalated Radiotherapy for Localised Prostate Cancer: A Single-institution Experience.

Publications

Clinical Outcomes of Dose-escalated Radiotherapy for Localised Prostate Cancer: A Single-institution Experience.

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