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It is an inherited type of follicular dysplasia. It most commonly affects dogs with blue or fawn coats, which are dilutions of black and brown, respectively Dilution is caused by irregularities in melanin transfer and storage. Melanosomes may clump within melanocytes of the skin and hair follicles, causing the hair shafts to easily fracture. [5]
Alopecia Areata. Alopecia areata is an autoimmune condition that affects about 2 percent of the population. It occurs when your immune system attacks your hair follicles. This can damage your ...
The decrease in thyroid hormone levels causes dermatological conditions, specifically alopecia, which is the most common dermatological symptom, as the hair sheds but cannot regrow fast enough due to the anagen stage of hair growth being stunted as thyroid hormone is important in that stage of hair growth. Other dermatological symptoms include ...
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 is believed to be caused by a genetic predisposition to a hormone defect. Often dogs will recover after neutering. [1] [2]
Hair diseases are illnesses that impact the persistence and regular growth of hair. Types of hair diseases include folliculitis , hirsutism , hypertrichosis , hypotrichosis ( alopecia ), Menkes kinky hair syndrome , monilethrix , and piedra .
Atrophic colloid follicles are lined by Hürthle cells (cells with intensely eosinophilic and granular cytoplasm, which are a metaplasia of the normal cuboidal cells that line the thyroid follicles). Fibrous tissue may be found throughout the affected thyroid as well. [5] In late stages of the disease, the thyroid may be atrophic. [10]
Poliosis circumscripta, commonly referred to as a "white forelock", is a condition characterized by localized patches of white hair due to a reduction or absence of melanin in hair follicles. Although traditionally associated with the scalp, poliosis can affect any hairy area on the body, including eyebrows, eyelashes, and beards.
Typical signs in dogs include hair loss and scaly skin. [21] Sporotrichosis is a fungal disease caused by Sporothrix schenckii that affects both dogs and humans. It is a rare disease in dogs, with cat and horse infections predominating in veterinary medicine. The disease in dogs is usually nodular skin lesions of the head and trunk. [22]
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