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Thyroid Carcinomas in the Dog

Jul 26, 2018

Thyroid tumors account for 1.2 % to 3.8 % of all tumors in the dog and typically develop in older dogs with a median age of 9-11 years. There is no gender predisposition but Golden retrievers, Boxers, and Beagles are over represented. Most thyroid carcinomas are non-functional (meaning they don’t produce thyroid hormones); 60% of patients have normal thyroid function; 30% are hypothyroid (under active thyroid); 10% are hyperthyroid (over active thyroid). Approximately 30-40% of thyroid carcinomas will have already metastasized (spread) at the time of diagnosis and ~80% will ultimately develop metastasis.