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3D conformal radiation therapy for palliative treatment of canine nasal tumors


Buchholz, Julia; Hagen, Regine; Leo, Chiara; Ebling, Alessia; Roos, Malgorzata; Kaser-Hotz, Barbara; Rohrer Bley, Carla (2009). 3D conformal radiation therapy for palliative treatment of canine nasal tumors. Veterinary Radiology and Ultrasound, 50(6):679-683.

Abstract

We evaluated the response of 38 dogs treated with a coarsely fractionated, palliative radiation protocol based on CT-based 3D treatment planning. Dogs with histologically confirmed malignant nasal tumors were studied. Treatment prescriptions consisted of 3–4 x 8Gy, 4–5 x 6Gy, or 10 x 3Gy fractions. Selected patient and tumor factors were evaluated for an effect on outcome. Resolution of clinical signs was reported after irradiation in all dogs. Acute toxicities were mild and short lived. Thirty-seven of 38 dogs died or were euthanized due to tumor-related disease. Overall median progression-free interval (PFI) was 10 months. Tumor stage affected response, with modified stage 1 patients having a median PFI 21.3 months vs. a median PFI of 8.5 months for modified stage 2 patients (P=0.0006). Modified stage was the only factor significantly related to outcome. Based on these findings, a palliative radiation prescription based on computerized treatment planning may be justified in some canine nasal tumor patients.

We evaluated the response of 38 dogs treated with a coarsely fractionated, palliative radiation protocol based on CT-based 3D treatment planning. Dogs with histologically confirmed malignant nasal tumors were studied. Treatment prescriptions consisted of 3–4 x 8Gy, 4–5 x 6Gy, or 10 x 3Gy fractions. Selected patient and tumor factors were evaluated for an effect on outcome. Resolution of clinical signs was reported after irradiation in all dogs. Acute toxicities were mild and short lived. Thirty-seven of 38 dogs died or were euthanized due to tumor-related disease. Overall median progression-free interval (PFI) was 10 months. Tumor stage affected response, with modified stage 1 patients having a median PFI 21.3 months vs. a median PFI of 8.5 months for modified stage 2 patients (P=0.0006). Modified stage was the only factor significantly related to outcome. Based on these findings, a palliative radiation prescription based on computerized treatment planning may be justified in some canine nasal tumor patients.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Epidemiology, Biostatistics and Prevention Institute (EBPI)
05 Vetsuisse Faculty > Veterinary Clinic > Department of Small Animals
Dewey Decimal Classification:610 Medicine & health
Language:English
Date:15 June 2009
Deposited On:28 Dec 2009 13:01
Last Modified:05 Apr 2016 13:35
Publisher:Wiley-Blackwell
ISSN:1058-8183
Publisher DOI:10.1111/j.1740-8261.2009.01603.x
Permanent URL: http://doi.org/10.5167/uzh-24830

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