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Medullary Thyroid Carcinoma in a Maltese Dog  

Hyun, Hee-Jin (College of Veterinary Medicine and Veterinary Medical Research Institute, Jeju National University)
Jung, Soo-Kyo (College of Veterinary Medicine and Veterinary Medical Research Institute, Jeju National University)
Kim, Jae-Hoon (College of Veterinary Medicine and Veterinary Medical Research Institute, Jeju National University)
Publication Information
Journal of Veterinary Clinics / v.31, no.5, 2014 , pp. 435-438 More about this Journal
Abstract
An 11-year-old, 2.67 kg female Maltese dog with 3 weeks history of palpable cervical mass near trachea was submitted to a local animal hospital. Radiography and ultrasonography showed radiopaque mass adjacent trachea and vagus nerve. Surgically excised mass was solitary and approximately $3.5{\times}2{\times}0.8cm$ in size. Histopathologically, there were large neoplastic foci admixed with normal thyroid tissues. These neoplastic foci were composed of small to large packets of the neoplastic cells with plasmacytic morphology, and these packets were divided by fine fibrovascular septa. Immunohistochemically, most neoplastic cells in the thyroid mass showed positive reactions for cytokeratin (AE1/AE3), chromogranin A, neuron specific enolase (NSE) and the negative reaction for vimentin. Based on the gross, histopathologic and immunohistochemical characteristics, this dog was diagnosed as medullary thyroid carcinoma.
Keywords
chromogranin A; dog; immunohistochemistry; medullary thyroid carcinoma; NSE;
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