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Alopecia resulting from hyperadrenocorticism is common in dogs and presents most often in the trunk region of the animal's body. [11] Hyperthyroidism is a second condition that can cause alopecia and in contrast to hyperadrenocorticism, regions experiencing rubbing, the joints of the limbs, and the tail tend to be the most affected regions in dogs.
Follicular dysplasia is a genetic disease of dogs causing alopecia, also called hair loss. It is caused by hair follicles that are misfunctioning due to structural abnormality. There are several types, some affecting only certain breeds. Diagnosis is achieved through a biopsy, and treatment is rarely successful.
The condition of a dog's skin and coat is also an important indicator of its general health. Skin disorders of dogs vary from acute, self-limiting problems to chronic or long-lasting problems requiring life-time treatment. Skin disorders may be primary or secondary (due to scratching, itch) in nature, making diagnosis complicated.
Androgenic alopecia also occurs in women, and more often presents as diffuse thinning without hairline recession. Like its male counterpart, the condition rarely leads to total hair loss. Treatment options are similar to those for men, although topical or systemic estrogen is used more often. [81] [84]
Alopecia X is a type of adult-onset follicular dysplasia in dogs previously known by many other names. The condition was first described in 1977. The condition was first described in 1977. The condition is believed to be caused by a genetic predisposition to a hormone defect.
It is important to note that treatment response to hair loss may be unpredictable and variable depending on the cause. 8.5% of patients with alopecia totalis may achieve complete recovery. [2] Certain conditions such as tinea capitis and trichotillomania usually respond once the infection or hair pulling behaviors are stopped. [ 3 ]
Frictional alopecia is the loss of hair that is caused by rubbing of the hair, follicles, or skin around the follicle. [1] The most typical example of this is the loss of ankle hair among people who wear socks constantly for years. [2] The hair may not grow back even years after the source of friction has ended.
The Siamese is predisposed to periocular leukotrichia, pinnal alopecia, and psychogenic alopecia. [27] Young Siamese cats are predisposed to histiocytic cutaneous mast cell tumours. [28] The Siamese is one of the more commonly affected breeds for gangliosidosis 1.