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Bromine is a chemical element; it has symbol Br and atomic number 35. It is a volatile red-brown liquid at room temperature that evaporates readily to form a similarly coloured vapour. Its properties are intermediate between those of chlorine and iodine. Isolated independently by two chemists, Carl Jacob Löwig and Antoine Jérôme Balard, its name was derived from the Ancient Greek βρῶμος (bromos) meaning "stench", referring to its sharp and pungent smell.
The halogens are a group in the periodic table consisting of six chemically related elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and the radioactive elements astatine (At) and tennessine (Ts), though some authors would exclude tennessine as its chemistry is unknown and is theoretically expected to be more like that of gallium. In the modern IUPAC nomenclature, this group is known as group 17.
Iodine is a chemical element; it has symbol I and atomic number 53. The heaviest of the stable halogens, it exists at standard conditions as a semi-lustrous, non-metallic solid that melts to form a deep violet liquid at 114 °C (237 °F), and boils to a violet gas at 184 °C (363 °F). The element was discovered by the French chemist Bernard Courtois in 1811 and was named two years later by Joseph Louis Gay-Lussac, after the Ancient Greek Ιώδης 'violet-coloured'.
Acne, also known as acne vulgaris, is a long-term skin condition that occurs when dead skin cells and oil from the skin clog hair follicles. Typical features of the condition include blackheads or whiteheads, pimples, oily skin, and possible scarring. It primarily affects skin with a relatively high number of oil glands, including the face, upper part of the chest, and back. The resulting appearance can lead to lack of confidence, anxiety, reduced self-esteem, and, in extreme cases, depression or thoughts of suicide.
Halothane, sold under the brand name Fluothane among others, is a general anaesthetic. It can be used to induce or maintain anaesthesia. One of its benefits is that it does not increase the production of saliva, which can be particularly useful in those who are difficult to intubate. It is given by inhalation.
In organic chemistry, an aryl halide is an aromatic compound in which one or more hydrogen atoms, directly bonded to an aromatic ring are replaced by a halide. The haloarene are different from haloalkanes because they exhibit many differences in methods of preparation and properties. The most important members are the aryl chlorides, but the class of compounds is so broad that there are many derivatives and applications.
Lichen planus (LP) is a chronic inflammatory and autoimmune disease that affects the skin, nails, hair, and mucous membranes. It is not an actual lichen, but is named for its appearance. It is characterized by polygonal, flat-topped, violaceous papules and plaques with overlying, reticulated, fine white scale, commonly affecting dorsal hands, flexural wrists and forearms, trunk, anterior lower legs and oral mucosa. The hue may be gray-brown in people with darker skin. Although there is a broad clinical range of LP manifestations, the skin and oral cavity remain as the major sites of involvement. The cause is unknown, but it is thought to be the result of an autoimmune process with an unknown initial trigger. There is no cure, but many different medications and procedures have been used in efforts to control the symptoms.
Hyperpigmentation is the darkening of an area of skin or nails caused by increased melanin.
Photodermatoses is a skin condition resulting in abnormal skin reactions to ultraviolet (UV) radiation. These abnormal skin reactions may develop into rashes. While reactions to UV radiation is common, true photodermatoses is considered when an abnormal reaction is caused by UV-A rays or radiation between 320 and 400 nm.
Polymorphous light eruption (PLE) presents with itchy red small bumps on sun-exposed skin, particularly face, neck, forearms and legs. It generally appears 30 minutes to a few hours after sun exposure and may last between one and 14 days. The bumps may become small blisters or plaques and may appear bloody,often healing with minimal scarring.
Acne is acneiform eruptions. It is usually used as a synonym for acne vulgaris, but may also refer to:
The Finkelstein reaction, named after the German chemist Hans Finkelstein, is an SN2 reaction that involves the exchange of one halogen atom for another. It is an equilibrium reaction, but the reaction can be driven to completion by exploiting the differential solubility of halide salts, or by using a large excess of the halide salt.
Granuloma annulare (GA) is a common, sometimes chronic skin condition which presents as reddish bumps on the skin arranged in a circle or ring. It can initially occur at any age, though two-thirds of patients are under 30 years old, and it is seen most often in children and young adults. Females are two times as likely to have it as males.
Acne fulminans is a severe form of the skin disease, acne, which can occur after unsuccessful treatment for another form of acne, acne conglobata. The condition is thought to be an immunologically induced disease in which elevated level of testosterone causes a rise in sebum and population of Cutibacterium acnes bacteria. The increase in the amount of C acnes or related antigens may trigger the immunologic reaction in some individuals and lead to an occurrence of acne fulminans. In addition to testosterone, isotretinoin may also precipitate acne fulminans, possibly related to highly increased levels of C acnes antigens in the patient's immune system. Acne fulminans is a rare disease. Over the past several years, fewer cases of this disease have occurred, possibly because of earlier and better treatment of acne. Approximately 100 patients with acne fulminans have been described.
Acneiform eruptions, or acne mimicking eruptions, are a group of skin conditions characterized by small bumps resembling acne. Typically, these bumps are mostly of similar size. Some bumps may be bigger or contain fluid. Generally, blackheads and whiteheads are absent. It tends to appear suddenly, with the chest and back most frequently affected.
Acne aestivalis also called as acne mallorca, is a special kind of polymorphous light eruption induced by ultra violet A radiation. This condition is said to be seasonal, usually affecting people in springtime and goes away in autumn when there is less sun light. This photo induced skin reaction leads to a mono-morphous eruption that consists of multiple, uniform, red, papular lesions. This skin reaction is classified as a delayed-type hypersensitivity because the onset is 24–72 hours after sun exposure. The condition equally affects men and women between the ages of 20–40 years old with no prior history of acne vulgaris. The eruption is unusual because it spares the face but it affects the lateral aspects of the upper arms, shoulder girdle, back, and chest. This condition's pathogenesis is not very well understood but scientists believe it an unfortunate side effect that results from a strong immune response to potentially cancer-causing cell damage.
Neonatal acne, also known as acne neonatorum, is an acneiform eruption that occurs in newborns or infants within the first 4-6 weeks of life, and presents with open and closed comedones on the cheeks, chin and forehead.
Halogen acne is caused by iodides, bromides and fluorides (halogens) that induce an acneiform eruption similar to that observed with steroids.
Iododermas are caused by iodides, with the most common sources of exposure being oral and intravenous contrast materials used to treat thyroid disease. The most common type of eruption is an acneiform eruption with numerous acutely inflamed follicular pustules, each surrounded by a ring of hyperemia.
Infantile acne is a form of acneiform eruption that occurs in infants from 6 weeks to 1 year of age. Typical symptoms include inflammatory and noninflammatory lesions, papules and pustules most commonly present on the face. No cause of infantile acne has been established but it may be caused by increased sebaceous gland secretions due to elevated androgens, genetics and the fetal adrenal gland causing increased sebum production. Infantile acne can resolve by itself by age 1 or 2. However, treatment options include topical benzyl peroxide, topical retinoids and topical antibiotics in most cases.
References
- ↑ Rapini, Ronald P.; Bolognia, Jean L.; Jorizzo, Joseph L. (2007). Dermatology: 2-Volume Set. St. Louis: Mosby. p. 310. ISBN 978-1-4160-2999-1.
- ↑ Perbet, S.; Salavert, M.; Amarger, S.; Constantin, J.-M.; D'Incan, M.; Bazin, J.-E. (1 July 2011). "Fluoroderma after exposure to sevoflurane". British Journal of Anaesthesia. 107 (1): 106–107. doi: 10.1093/bja/aer180 . PMID 21685121 – via bja.oxfordjournals.org.
- ↑ Guerrero, Arthur F.; Guerrero, Karen T.; Shakir, K.M. Mohamed (2011). "Thyroid Protection Gone Awry: Iododerma Following Potassium Iodide Administration Prior to Metaiodobenzylguanidine Scintigraphy". Thyroid. Mary Ann Liebert Inc. 21 (1): 93–94. doi:10.1089/thy.2009.0467. ISSN 1050-7256. PMID 21162686.
- ↑ Didona, D.; Solimani, F.; Mühlenbein, S.; Knake, S.; Mittag, H.; Pfützner, W. (October 8, 2019). "Diffuse vegetating bromoderma". Journal of the European Academy of Dermatology and Venereology. Wiley. 34 (2): e53–e55. doi:10.1111/jdv.15899. ISSN 0926-9959. PMID 31433883. S2CID 201276655.
- ↑ Ghazzawi, Raghad A; Alqurashi, Mohammed G; Almalki, Nada A; Alosaimi, Ashwaq K; Al Hawsawi, Khalid (November 23, 2022). "Halogenoderma: A Case Report and Review of the Literature". Cureus. Cureus, Inc. 14 (11): e31846. doi: 10.7759/cureus.31846 . ISSN 2168-8184. PMC 9789362 . PMID 36579296.
- 1 2 Hesseler, Michael J.; Clark, Matthew R.; Zacur, Jennifer L.; Rizzo, Jason M.; Hristov, Alexandra C. (2018). "An acneiform eruption secondary to iododerma". JAAD Case Reports. Elsevier BV. 4 (5): 468–470. doi:10.1016/j.jdcr.2018.02.005. ISSN 2352-5126. PMC 6031573 . PMID 29984285.
- ↑ Aliagaoglu, Cihangir; Turan, Hakan; Uslu, Esma; Albayrak, Hulya; Yazici, Serkan; Kaya, Ertugrul (April 8, 2013). "Iododerma following topical povidone-iodine application". Cutaneous and Ocular Toxicology. Informa UK Limited. 32 (4): 339–340. doi:10.3109/15569527.2013.780181. ISSN 1556-9527. PMID 23560395. S2CID 42263284.