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MRI in the differentiation between neoplastic and non-neoplastic brain lesions
Brain lesions remain a diagnostic problem in small animals. Unfortunately, it makes a big therapeutic and prognostic difference whether the problems are neoplastic or inflammatory. Is MRI as a new promising technique really helpful? An interesting study from the UK!

The aim of this study was to identify magnetic resonance (MR) signs that aid differentiation of neoplastic vs. non-neoplastic brain diseases in dogs and cats.

MR images of 36 dogs and 13 cats with histologic diagnosis of intracranial disease were reviewed retrospectively.

Diagnoses included 30 primary and three metastatic brain tumors, 11 infectious/inflammatory lesions, three vascular, one degenerative disease, and one developmental malformation. Upon univariate analysis of 21 MR signs, there were seven that had a significant association with neoplasia: single lesion (P=0.004), shape (P=0.015), mass effect (P=0.002), dural contact (P=0.04), dural tail (P=0.005), lesions affecting adjacent bone (P=0.008), and contrast enhancement (P=0.025).

Increasing age was also found to be associated with neoplasia (P=0.0001). MR signs of non-neoplastic brain diseases in dogs and cats were more variable than those of brain neoplasia.


Source: Cherubini, Giunio Bruto, Mantis, Panagiotis, Martinez, Teresa A., Lamb, Christopher R. & Cappello, Rodolfo (2005): UTILITY OF MAGNETIC RESONANCE IMAGING FOR DISTINGUISHING NEOPLASTIC FROM NON-NEOPLASTIC BRAIN LESIONS IN DOGS AND CATS. In: Veterinary Radiology & Ultrasound 46 (5), 384-387




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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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