Hypothyroidism, Canine - contd.
The most common way to diagnose hypothyroidism is to measure baseline blood levels of the thyroid hormone called T4. Decreased hormone levels are indicative of hypothyroidism; however, other non-related diseases and medications will also lower levels of this hormone. When clinical signs exist together with a low T4 level, a definitive diagnosis of hypothyroidism usually can be made. Commonly, the veterinarian will order a CBC, or complete blood count, as well as a serum chemistry panel to look for changes consistent with hypothyroidism. More specialized tests, such as a complete thyroid hormone panel, may be needed if a normal T4 is found and the dog has clinical signs of hypothyroidism.
