MAGNETIC RESONANCE IMAGING AND ULTRASONOGRAPHY IN THE DIAGNOSIS OF A MALIGNANT PERIPHERAL NERVE SHEATH TUMOR IN A DOG |
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| Authors: | Simon R Platt BVM&S John Graham MVB MSc Cheryl L Chrisman DVM MS Kathleen Collins DVM Sundeep Chandra BVSc PhD Jeffrey Sirninger DVM Susan M Newell DVM MS |
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| Institution: | Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville 32610, USA. |
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| Abstract: | A 9-year-old male neutered mixed breed dog had a two-month history of progressive left thoracic limb lameness. There was electromyographic evidence of denervation potentials in all muscles of this limb. In magnetic resonance images a multilobulated, hyperintense mass was visible caudal to the middiaphysis of the left humerus on T-2 weighted images. The mass, which was isointense with surrounding tissue on T1 weighted images, extended proximally towards the brachial plexus. The mass was also visible as a fusiform structure of mixed echogenicity sonographically, although fine-needle aspiration performed at this time was nondiagnostic. A malignant peripheral nerve sheath tumor was diagnosed histopathologically. |
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| Keywords: | magnetic resonance imaging ultrasound needle aspiration peripheral nerve sheath tumor |
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