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One or two doses of cisplatin in canine osteosarcoma?
Osteosarcomas, often affecting young dogs, still belong to the malignant neoplasias with the poorest prognosis and only a few therapeutic options. The local delivery cisplatin in a biodegradable polymer (after amputation) is one of the newer therapies. Is one treatment enough or are two treatments more effective?

The purpose of this study was to evaluate one versus two doses of local delivery cisplatin in a biodegradable polymer (OPLA-Pt) for the treatment of osteosarcoma (OSA) after amputation in dogs.

Medical records were reviewed retrospectively, and 105 dogs were included in the study; 39% of dogs received one treatment (surgical implantation) of OPLA-Pt and 61% of dogs received two treatments of OPLA-Pt after amputation.

Administration of two doses of OPLA-Pt did not have a significant effect on disease-free interval or survival time compared to one dose.

The anatomic site of the tumour was identified as a prognostic factor, and dogs with proximal humeral OSA had the shortest disease-free interval and survival times.

There was no advantage to giving a second dose of local delivery cisplatin following amputation for the treatment of OSA in dogs.


Source: Mehl, M. L., Seguin, B., Dernell, W. S., Lafferty, M., Kass, P. H. & Withrow, S. J. (2005):
Survival analysis of one versus two treatments of local delivery cisplatin in a biodegradable polymer for canine osteosarcoma. In: Veterinary and Comparative Oncology 3 (2), 81-86.




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SMALL ANIMAL PRACTICE

Electroretinography as a prognostic indicator after retinal reattachment surgery
Retinal detachment is one of the ophthalmological emergencies, and even if the diagnosis is made early and a reattachment surgery is performed immediately many dogs do not regain postoperative vision. This 18‐month prospective study recorded signalment, duration, cause, and extent of retinal detachment and pre‐operative vision status. Rod and mixed rod‐cone ERG responses were recorded prior to RRS. Referring veterinary ophthalmologists assessed vision 2 months postoperatively to determine whether pre‐operative electroretinography (ERG) predicts postoperative vision in dogs undergoing retinal reattachment surgery (RRS).

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