Monday, April 22, 2013

Acute toxicity profile in prostate cancer with conventional and ...

??Acute toxicity profile in prostate cancer with conventional and hypofractionated treatment

Purpose: To compare the acute toxicities in radical treatment of prostate cancer between conventional schedule (C-ARM) with 78 Gy/39 fractions and hypofractionation conformal treatment (H-ARM) with 69 Gy/23 fractions.Methods and material: This prospective double arm study consisted of 217 patients with prostate cancer, 112 in H-ARM and 105 in C-ARM arm. C-ARM received conventional six- field conformal radiotherapy with 78 Gy in 39 fractions while H-ARM received hypofractionation with 69 Gy in 23 fractions.

Weekly assessment of acute reactions was done during treatment and with one, and 3 months using RTOG scale. Univariated analysis was performed to evaluate differences between the incidences of acute reaction in the treatment arms.

Variables with p value less than 0.1 were included in the multivariated logistic regression.

Results: There was no difference between H-ARM versus C-ARM for severity and incidence in genitourinary (GU) and gastrointestinal (GI) acute toxicity. During the treatment comparing H-ARM with C-ARM no differences was observed for GI toxicity (grade 0--3; H-ARM = 45.5%, 34%, 18.7% and 1.8% versus C-ARM = 47.6%, 35.2%, 17.2% and 0).

For acute GU toxicity no difference was detected between H-ARM (grade 0--3; 22.3%, 54.5%, 18.7% and 4.5%) and C-ARM (grade 0--3; 25.8%, 53.3%, 17.1% and 3.8%).At the 3- months follow-up, persistent Grade >=2 acute GU and GI toxicity were 2.5% and 1.8% in H-ARM versus 5.7 % and 3% in C-ARM (p >0.05). In univariated and multivariated analyses, there was not any dosimetric predictor for GI and GU toxicity.

Conclusions: Our data demonstrate that hypofractionated radiotherapy achieving high biological effective dose using conformal radiotherapy is feasible for prostate cancer, being well tolerated with minimal severe acute toxicity.

Author: Gustavo Arruda VianiLucas Bernardes da SilvaBruna Bueno da SilvaYuri Bonicelli CrempeVinicius Spazzapan MartinsRicardo Jose FerrariMariana Colbachini PĆ³loBruno Thiago RossiElton SuguikawaGiseli Correa ZullianiEduardo Jose Stefano

Published on: 2013-04-21

Copyright by the authors listed above - made available via BioMedCentral (Open Access). Please make sure to read our disclaimer prior to contacting 7thSpace Interactive. To contact our editors, visit our online helpdesk. If you wish submit your own press release, click here.
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