Two skin and hair disorders related to an imbalance of reproductive hormones are alopecia and dermatosis. More specifically, alopecia is characterized by a loss of hair leading to baldness, and dermatosis is characterized by a diseased condition of the skin. There are tests to positively identify the conditions, and the cause behind the skin and hair reactions, but there are a lot of reasons for why a cat would have these types of reactions. If all other indications point to an imbalance in hormones related to reproductive functioning, your veterinarian will try supplemental therapy to either increase or decrease hormone levels to a normal amount. Identification of alopecia and/or dermatosis is assured when the conditions spontaneously resolve after your cat has been given reproductive hormone therapy.
Symptoms:
Types:
Affected cats are categorized, and treated, according to the measurable amount of reproductive hormones being produced in the body:
Estrogen-responsive - ovarian imbalance II in females - rare
Too much estrogen - ovarian imbalance I in females - rare
Too much androgen (male reproductive hormone) - associated with testicular tumors in non-neutered males
Testosterone-responsive - old castrated males - rare
Castration-responsive - intact males with normal, descended testicles
Adrenal reproductive hormone imbalance - adrenal hyperplasia–like syndrome (enlargement of tissue)
You will need to give a thorough history of your cat's health, including a background history of symptoms, and possible incidents that might have preceded this condition. Your veterinarian will then perform a thorough physical exam on your cat, including a biochemical profile, a complete blood count, a urinalysis, and an electrolyte panel. Serum sex hormone tests will often show as normal in these cats. A skin biopsy (tissue sample) can illustrate abnormal sex hormone receptors in the skin.
X-ray, ultrasonography, and laparoscopy (using a small camera to examine the interior of the abdomen) imaging can be used for detection of ovarian abnormalities, testicular disorders and cancer.
An adrenocorticotropin hormone (ACTH) stimulation test, and an adrenal reproductive hormone test may be performed to measure the functional capability of the adrenal gland, and to be sure that it is specifically producing reproductive hormones. A Gonadotropin-releasing hormone (GnRH) response test can demonstrate the response of the cells in the testes and ovaries to gonadotropin hormones. Specifically, the hormones that produce testosterone, primarily.
If your cat is suffering from abnormal reproductive hormone levels, neutering or spaying will be one of the primary treatments. This alone may be enough to resolve the skin disorders. If your cat is on estrogen therapy, and the results are adverse to the health of your cat, your veterinarian will discontinue it. Your veterinarian will prescribe topical medicine, or prescription shampoo for dandruff, bacterial skin infections, and itching.
Do not breed your male cat if it is affected with cryptorchidism (undescended testicles). It is highly advised that all cats suspected of suffering from sex hormone related skin disorders should be spayed or neutered. Your veterinarian will schedule follow-up appointments as necessary for further treatment of any underlying sex-hormone related causes of the skin disease.
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