Alopecia

(Hair loss, hair loss)

Alopecia is defined as body hair loss. Hair loss is cosmetic and psychological reasons, often a cause of great concern for the patient, but can also be an important signs of systemic disease.

(See also Alopecia Areata.) Alopecia is defined as body hair loss. Hair loss is cosmetic and psychological reasons, often a cause of great concern for the patient, but can also be an important signs of systemic disease. Pathophysiology growth cycle hair grows in cycles. Each cycle consists of stages: A long growth phase (anagen) A brief temporary apoptotic phase (catagen) a short resting phase (telogen) at the end of the resting phase, the hair of (exogenous) and from the follicle coat grows a new hair, whereby the cycle of begins again. Normally 50 to 100 hairs a day to reach the end of the resting phase and fall out. occur unless significantly more than 100 hairs a day in the resting phase, a clinically significant hair loss (telogen effluvium) may occur. An interruption of the growth phase, which causes abnormal loss of anagen hairs, i.e. anagen Effluvium.Klassifikation alopecia can be used as focal or diffuse be klassifizert, as well as by the presence or absence of scarring. Alopecia with scar formation is the result of the active destruction of the hair follicle. The follicle is damaged beyond repair and replaced by connective tissue. Several diseases of the hair show a biphasic pattern with alopecia without scarring early in the course of the disease and alopecia with permanent hair loss with further progression of the disease. Alopecia with scarring can continue in primary forms where the follicles are the target of the inflammation itself, and are divided secondary forms where the follicles are destroyed by non-specific inflammation, (Some causes of alopecia). Nichtvernarbende alopecia results from processes that reduce hair growth or slow down without damaging the hair follicles irrevocably. Disorders that affect the hair shaft (trichodystrophies) primarily count as nichtvernarbende alopecia. Some causes of alopecia Alopecia disorder causes or descriptions Nichtvernarbender hair loss anagen effluvium (caused by substances that affect the anagen cycle or disturb) chemotherapeutics poisoning (z. B. thallium, arsenic and other metals) radiation (also causes scarring focal hair loss) androgenetic alopecia (hair loss with male or female pattern) androgens (eg. B. dihydrotestosterone) Family Pathological hyperandrogenism (Virilization in women hirsutism) Congenital disorders Congenital atrichia with papules Ectodermal dysplasia Primary hair shaft abnormalities Easy hair breakage (trichorrhexis nodosa) Genetic diseases lot-anagen syndrome Excessive use of hair dryers ( “bubble hair”) telogen effluvium (increased number of hairs in the resting phase ) drugs (eg. B. antimitotic chemotherapeutics, anticoagulants, retinoids, oral contraceptives, ACE inhibitors, beta blockers, lithium, antithyroid drugs, antiepileptics, vitamin A-excess) Endocrine problems (eg. B. hyperthyroidism, hypothyroidism) nutrient deficiency (for. Example, zinc, biotin, or possibly iron deficiency) Physiological or psychological stress (eg. as surgery, systemic or febrile diseases, pregnancy) Alopecia areata diffuser scalp hair loss (less common form of alopecia areata) Alopecia totalis (complete loss of scalp hair) alopecia universalis (total hair loss of the head and the body) Nichtvernarbender focal hair loss Alopecia areata Patchy head hair loss (most common type of alopecia areata) ophiasis (circular hair loss on the head) other hair loss caused by compulsive hair pulling, rotating, or Backcomb (trichotillomania) Lipedematous alopecia Postoperative (pressure-induced) alopecia Primary hair shaft abnormalities Secondary syphilis SLE (typically causes scarring discoidal lesions or diffuse alopecia without scarring) Temporal triangular alopecia tinea capitis * Microsporum audouinii Microsporum canis Trichophyton Trichophyton tonsurans schoenleinii Traction Alopecia elongation due to braids, hair curlers or ponytails (mainly occurs in frontal and temporal hairlines on) scar-forming hair loss (focal or diffuse) acne nuchae Folliculitis on the occipital scalp, resulting in scarring alopecia Central centrifugal cicatricial alopecia (CCCA) Progressive scarring alopecia Most on the crown or apex of the scalp cause of hair loss in dark-skinned patients; usually occurs in women of African descent on Chronic cutaneous lupus discoid lupus lesions of the scalp Dissecting cellulitis of the scalp inflammatory nodules that grow together with the sinus tract Part of follicular Okklusionstetrade † Lichen planopilaris (lichen planus of the scalp) Typically perifollicular erythema and follicular hyperkeratosis secondary scarring alopecia burns Scleroderma Systemic sclerosis (Sklerode rmie) radiation therapy (also causes nichtvernarbenden diffuse hair loss) sarcoidosis skin cancer Super Infected kerion (due to severe primary syphilis or severe tinea capitis) Trauma * tinea capitis can cause scarring if the follicles are sufficiently damaged. † The follicular Okklusionstetrade (also called acne inversa) are Acne conglobata, acne inversa, dissecting cellulitis of the scalp and Pilonidalsinus diseases that have a follicular Hypercornification together. The etiology alopecia include a large group of disorders with different causes (Some causes of alopecia). The most common cause of alopecia is androgenetic alopecia (male-female-pattern or hair loss) Androgenetic alopecia is a hereditary androgen-dependent disorder in which dihydrotestosterone plays an important role. This form of alopecia may ultimately up to the age of 70 years (male pattern baldness) and about half of all women affect up to 80% lighter-skinned men (female pattern baldness). Androgenetic alopecia ALEX BARTEL / SCIENCE PHOTO LIBRARY var model = {thumbnailUrl: ‘/-/media/manual/professional/images/m1080349-androgenetic-alopecia-science-photo-library-high_de.jpg?la=de&thn=0&mw=350’ , imageUrl: ‘/-/media/manual/professional/images/m1080349-androgenetic-alopecia-science-photo-library-high_de.jpg?la=de&thn=0’, title: ‘Androgenetic alopecia’, description: ‘ u003Ca id = “v37894766 ” class = “”anchor “” u003e u003c / a u003e u003cdiv class = “”para “” u003e u003cp u003eAndrogenetische alopecia or hair loss with male pattern occurs in women and men. u003c / p u003e u003c / div u003e ‘credits’ ALEX BARTEL / SCIENCE PHOTO LIBRARY’

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