Orthovoltage radiation and weekly low dose of doxorubicin for the treatment of incompletely excised soft-tissue sarcomas in 39 dogs |
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| Authors: | Simon D Ruslander D M Rassnick K M Wood C A Frimberger A E Cotter S M King N W Moore A S |
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| Institution: | Harrington Oncology Program, Tufts University School of Veterinary Medicine, North Grafton, MA 01536, USA. |
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| Abstract: | The efficacy and toxicity of orthovoltage radiation therapy and concurrent low doses of doxorubicin for the treatment of incompletely excised soft-tissue sarcomas in 39 dogs was investigated retrospectively. The 39 dogs had 40 soft-tissue sarcomas and received 51 Gy orthovoltage radiation in 17 daily 3 Gy fractions; they also received 10 mg/m(2) doxorubicin once a week administered intravenously one hour before the dose of radiation. The median follow-up time was 910 days. The tumours recurred locally in seven of the dogs, in five of them within the radiation field; the median time to their recurrence was 213 days (range 63 to 555 days). Six of the dogs developed a distant metastasis after a median time of 276 days (range eight to 826 days). The one-year and two- to four-year tumour control rates were 84 per cent and 81 per cent, respectively, and the one-, two- and three- to four-year survival rates were 85 per cent, 79 per cent and 72 per cent, respectively. Tumours with a mitotic rate of more than 9 per 10 high-power fields were significantly more likely to recur, and the dogs with such tumours survived for significantly shorter periods. |
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