Scintigraphy may be useful for which patient condition?

• A. A dog with hip dysplasia
• B. A horse with colic
• C. A rabbit with dental disease
• D. A cat with hyperthyroidism

Answer: (D)

Scintigraphy uses a radioactive tracer to show how tissues are functioning, not just how they look anatomically. In cats, hyperthyroidism causes the thyroid gland to be overactive, so the scan reveals increased, diffuse tracer uptake in the neck region. This helps confirm excess thyroid activity and can guide treatment planning, such as deciding between surgical removal or radioactive iodine therapy.

The other scenarios rely more on structural imaging. Hip dysplasia in a dog is typically evaluated with radiographs (and sometimes CT/MRI) to assess bone structure. Colic in a horse is a medical emergency best assessed with ultrasound and abdominal imaging. Rabbit dental disease is inspected with dental radiographs or CT to evaluate tooth structure and eruption. So the cat with suspected hyperthyroidism is where scintigraphy provides the most direct and useful functional information.