Thyroid Carcinoma in Cat

Abstract

A nine-year-old male Japanese cat was brought in with a three-month history of ventral swelling of the neck. By clinical and blood chemistry tests, the disease was diagnosed as hyperthyroidism with hypertrophy of the thyroid gland. Therefore, administration of thyroid hormone synthesis inhibitor was initiated. The swelling grew larger gradually in spite of this treatment, so thyroidectomy was performed three months later. Histopatholiogically, the disease was confirmed to be a thyroid carcinoma. The cat has been given the same medicine for a year, and the progress is satisfactory without any abnormal signs.