Species: All

Specimen: See specific test.

Container: See specific test.

Collection protocol:

Thyroid hormone plays an important role in controlling metabolism of the skin. Hypothyroidism should be ruled out as the underlying cause of pyoderma. See – Thyroid function in Dogs.

Skin diseases due to cortisol abnormalities are also important – See Hyperadrenocorticism (Cushing’s’ Disease) in Dogs and Cats, Pituitary Pars Intermedia Dysfunction or Hyperadrenocorticism in Horses.

Dermatoses due to sex hormone abnormalities are uncommon, and should be considered only where overall patient assessment including the results of general blood and dermatological testing support the diagnosis. Hyperoestrogenism and hyperandrogenism are recognised, often in dogs with testicular tumours. These are difficult to diagnose by blood sex hormone concentrations since those fluctuate during the day, but high concentrations of oestradiol or testosterone can be found. Oestradiol testing may need to be performed at a referral laboratory.

General information about when this test is indicated: Dermatoses in older animals, particularly with non-inflammatory alopecia.