Hypertrichosis is an abnormal amount of hair growth over the body.[1][2] The two distinct types of hypertrichosis are generalized hypertrichosis, which occurs over the entire body, and localized hypertrichosis, which is restricted to a certain area.[1] Hypertrichosis can be either congenital (present at birth) or acquired later in life.[3][4] The excess growth of hair occurs in areas of the skin with the exception of androgen-dependent hair of the pubic area, face, and axillary regions.[5]
Several circus sideshow performers in the 19th and early 20th centuries, such as Julia Pastrana, had hypertrichosis.[6] Many of them worked as freaks and were promoted as having distinct human and animal traits.
Two methods of classification are used for hypertrichosis.[4] One divides them into either generalized versus localized hypertrichosis, while the other divides them into congenital versus acquired.[1][7]
Congenital forms of hypertrichosis are caused by genetic mutations, and are extremely rare, unlike acquired forms.[4] Congenital hypertrichosis is always present at birth.[3]
Acquired hypertrichosis appears after birth. The multiple causes include the side effects of drugs, associations with cancer, and possible links with eating disorders. Acquired forms can usually be reduced with various treatments.
Hypertrichosis is often mistakenly classified as hirsutism.[1] Hirsutism is a type of hypertrichosis exclusive to women and children, resulting from an excess of androgen-sensitive hair growth.[16] Patients with hirsutism exhibit patterns of adult male hair growth.[1] Chest and back hair are often present on women with hirsutism.[16]
Hirsutism is both congenital and acquired. It is linked to excessive male hormones in women, thus symptoms may include acne, deepening of the voice, irregular menstrual periods, and the formation of a more masculine body shape.[16] Increases in androgen (male hormone) levels are the primary cause of most hirsutism cases.[17] If caused by increased levels of androgens, it can be treated with medications that reduce androgen levels. Some birth control pills and spironolactone reduce androgen levels.[16]
The primary characteristic of all forms of hypertrichosis is excessive hair. Hair in hypertrichosis is usually longer than expected[7] and may consist of any hair type (lanugo, vellus, or terminal).[18] Patterned forms of hypertrichosis cause hair growth in patterns. Generalized forms of hypertrichosis result in hair growth over the entire body. Circumscribed and localized forms lead to hair growth restricted to a certain area.[citation needed]
Acquired hypertrichosis lanuginosa is commonly present with cancer.[23] This condition is also linked to metabolic disorders, such as anorexia, hormone imbalances, such as hyperthyroidism, or as a side effect of certain drugs.[23]
Acquired generalized hypertrichosis may be caused by cancer. The resulting hair growth is known as malignant down. The mechanism behind cancer induced hypertrichosis is unknown.[3] Oral and topical Minoxidil treatments are also known to cause acquired generalized hypertrichosis.[14]
Several medications can cause generalized or localized acquired hypertrichosis including:
Acquired hypertrichosis is usually reversible once the causative medications are discontinued.
The exact genetic mutation that causes congenital circumscribed, localized, and nevoid hypertrichosis is unknown.[1]
A number of mechanisms can lead to hypertrichosis. One cause involves areas of the skin that are transforming from the small vellus type to the larger terminal type.[7] This change normally occurs during adolescence, when vellus hair follicles in the underarms and groin grow into terminal hair follicles.[1] Hypertrichosis involves this same type of switching, but in areas that do not normally produce terminal hair.[1] The mechanisms for this switch are poorly understood.[1]
Another mechanism involves a change in the hair cycle.[1] There are three stages of the hair cycle: the anagen phase (hair growth), the catagen phase (hair follicle death), and the telogen phase (hair shedding).[1] If the anagen phase increases beyond what is normal, that region of the body will experience excessive hair growth.[7]
Hypertrichosis is diagnosed clinically by the occurrence of hair in excess of what is expected for age, sex, and ethnicity in areas that are not androgen-sensitive.[7] The excess can be in the form of excessive length or density and may consist of any hair type (lanugo, vellus, or terminal).[18]
There is no cure for any congenital forms of hypertrichosis. The treatment for acquired hypertrichosis is based on attempting to address the underlying cause.[18] Acquired forms of hypertrichosis have a variety of sources, and are usually treated by removing the factor causing hypertrichosis, e.g. a medication with undesired side-effects. All hypertrichosis, congenital or acquired, can be reduced through hair removal.[24] Hair removal treatments are categorized into two principal subdivisions: temporary removal and permanent removal.[24] Treatment may have adverse effects by causing scarring, dermatitis, or hypersensitivity.[3]
Temporary hair removal may last from several hours to several weeks, depending on the method used. These procedures are purely cosmetic.[2] Depilation methods, such as trimming, shaving, and depilatories, remove hair to the level of the skin and produce results that last several hours to several days.[25] Epilation methods, such as plucking, electrology, waxing, sugaring, threading remove the entire hair from the root, the results lasting several days to several weeks.[25]
Permanent hair removal uses chemicals, energy of various types, or a combination to target the cells that cause hair growth. Laser hair removal is an effective method of hair removal on hairs that have color. The laser targets the melanin in the lower third of the hair follicle.[2] Electrology uses electric current or localized heating.
As of 2006[update], medication to reduce production of hair is being tested.[needs update] One medicinal option suppresses testosterone by increasing the sex hormone-binding globulin.[26] Another controls the overproduction of hair through the regulation of a luteinizing hormone.[26]
Congenital forms of hypertrichosis are extremely rare. Only 50 cases of congenital hypertrichosis lanuginosa have been recorded since the Middle Ages,[3] and fewer than 100 cases of congenital generalized hypertrichosis have been documented in scientific publications and by the media.[22] Congenital generalized hypertrichosis is isolated to one family in Mexico.[1] Acquired hypertrichosis and hirsutism are more common.[4][27] For example, hirsutism occurs in about 10% of women between ages 18 and 45.[27]
People with hair often found jobs as circus performers, making the best of their unusual appearance. Fedor Jeftichew ("Jo-Jo the Dog-faced Man"), Stephan Bibrowski ("Lionel the Lion-faced Man"), Jesús "Chuy" Aceves ("Wolfman"), Annie Jones ("the bearded woman") and Alice Elizabeth Doherty ("The Minnesota Woolly Girl") all had hypertrichosis.[8] Extensive hypertrichosis carries an emotional burden and can cause cosmetic embarrassment; however, some people attempt no treatments because they say it defines who they are.[2][28]
Petrus Gonsalvus (1537–1618) was referred to by Italian naturalist Ulisse Aldrovandi as "the man of the woods".[29] Four of his seven children were also afflicted with hypertrichosis and painted.[30]
Barbara van Beck (1629–1668?) is one of the first people to be depicted with Ambras syndrome.[31] She was the only member of her family with the condition. She travelled around Europe, living in court and appearing before the nobility in cities such as London and Paris.[32]
One record in history concerning congenital hypertrichosis lanuginosa is the hairy family of Burma, a four-generational pedigree of the condition. In 1826, John Crawford was leading a mission for the Governor-General of India through Burma.[33][34] He tells of meeting a hairy man, Shwe-Maong. Shwe-Maong lived in the court of King Ava and acted as an entertainer.[33] Shwe-Maong had four children: three unaffected children, and one child with congenital hypertrichosis, named Maphoon.[33] On a second mission to Ava, Maphoon was described as a thirty-year-old woman with two sons, one of which had hypertrichosis.[33] The affected son was named Maong-Phoset. He had an affected daughter named Mah-Me.[33] Whereas all affected members of the family had dental problems, the unaffected members had perfect teeth.[33]
Julia Pastrana (1834–1860)[6] travelled throughout the United States in a freak show as the bearded lady, capturing the attention of many artists.[6] She is portrayed as having dark extensive hairs distributed equally throughout the surface of her body, even on the palms of her hands.[6] Originally, she was believed to have congenital hypertrichosis lanuginosa; however, the generalized form of the syndrome coupled with her gingival hyperplasia indicated that her condition was congenital terminal hypertrichosis.[6][8] This was not confirmed until after her death, when it became clear that her X-linked syndrome resulted in terminal hairs.[8]
In 2011, Supattra Sasupan[35] (Thai: สุพัตรา สะสุพันธ์; born August 5, 2000),[35] an 11-year-old girl from Thailand with hypertrichosis was named the world's hairiest girl by the Guinness Book of World Records (as Supatra Sasuphan).[36]
Origin of the word hypertrichosis is in Greek roots (hyper-, ʽexcessʼ; trikhos, hair and -osis, ʽformationʼ) and means a disorder that causes excessive hair growth over the body. Medieval sources do not use this term, however prefer hairy men and women instead. These men and women are often mistaken for savages, who similarly have excessive hair, but hairy and savage individuals belong to different categories, since savagery is associated with social or religious isolation. Having exceptional strength, they are deemed closer to the animal than to the human plane. On the contrary, hairy men and women with hypertrichosis are not necessarily isolated and they often live in courts as entertainers, together with other monster-like subjects.[37]
The first recorded case of hypertrichosis was Petrus Gonsalvus of the Canary Islands.[8] This was documented by Ulisse Aldrovandi and published in his posthumous Monstrorum Historia cum Paralipomenis historiae omnium animalium in 1642.[8][38] He noted that two daughters, a son, and a grandchild in Gonsalvus' family all had hypertrichosis. Altrovandus dubbed them the Ambras family, after Ambras Castle near Innsbruck, where portraits of the family were found.[8] During the next 300 years, about 50 cases were observed. The scientist Rudolf Virchow described a form of hypertrichosis accompanied by gingival hyperplasia in 1873.[8]
In summer 2019, at least 17 Spanish children have developed so-called “werewolf syndrome”, Spain's health ministry has said. Instead of being treated with omeprazole, a drug that helps with gastric reflux, they had received a treatment of minoxidil, a medication against hair loss. How the laboratory FarmaQuimica Sur, based in Malaga, made the mistake, is not yet clear. The lab has been closed as a precaution.[39]
The condition is also sometimes found in cats. A male Persian with the condition named Atchoum achieved a certain level of notice due to the unusual appearance his hypertrichosis gave him, and has been nicknamed "The Werewolf Cat" (not to be confused with Lykoi or werewolf cat).[40]
In 1955, a female Müller's Bornean gibbon was obtained from Sarawak that exhibited abnormal hair growth in the facial region. It has been hypothesized that this could be due to facial hypertrichosis.[41]
Hypertrichosis (often mistakenly classified as hirsutism) is a well documented condition in horses with a hormonal disorder of the hypothalamus, called Cushing's disease. It is the most common endocrine disease of the middle-aged to older horse, often resulting in fatal laminitis. It can be successfully controlled by medications if diagnosed early.[42]
محيي عبد الحسين مشهدي محي الشمري متكلماً في قاعة الخلد بما قيل إنه تآمر معلومات شخصية الميلاد سنة 1935 بغداد، وبغداد الوفاة 8 أغسطس 1979 (43–44 سنة) بغداد مواطنة العراق الديانة الشيعة[1] الحياة العملية المهنة سياسي، ومسؤول، وموظف مدني الحزب ح
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