Thyroid Adenoma and Hyperthyroidism in the Cat

Cats with hyperthyroidism often present to us because they are losing weight. A cat with hyperthyroidism is often very thin despite having a ravenous appetite. A skinny cat with an insatiable appetite should be examined carefully for hyperthyrodisim. In some cases the thyroid glands can be palpably enlarged. The heart rate in a cat with hyperthyrodism is increased and frequently above 200 beats per minute. A large goitre can sometimes be palpated.

This cat presented with text book symptoms. There was a heart rate of 220 beats per minute, an insatiable appetite despite being very thin, and a very large goitre palpable on the neck adjacent the larynx.

Cat with thyroid disease

Cat with thyroid disease

Routine bloods confirmed an elevated thyroid hormone level

Cats with hyperthyroidism have high blood pressure and are susceptible to renal glomerular disease and kidney disease. These cats are also susceptible to vascular disease such as cerebral vascular accidents (strokes) and aneurisms. We frequently see retinal detachment due to high blood pressure also. Cats with over active thyroids can become suddenly and acutely blind if their retinas detach from the back of the eye.

Here is the enlarged thyroid following surgical dissection and removal. The mass was sent for histopathology. Luckily for our patient, the mass was a benign thyroid adenoma. The lesion was completely removed with clear margins and the prognosis is excellent.

Thyroid adenoma

Thyroid adenoma

Surgery in this case should be curative

A great outcome for our patient.

Smiles all round

Smiles all round

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