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Hidradenitis suppurativa (HS), sometimes known as acne inversa or Verneuil's disease, is a long-term dermatological condition characterized by the occurrence of inflamed and swollen lumps. [ 2 ] [ 3 ] These are typically painful and break open, releasing fluid or pus . [ 3 ]
Hidradenitis suppurativa is a chronic cutaneous condition originally thought to be primarily characterized by suppurative inflammation of the apocrine sweat glands. [ 3 ] : 710 Recent evidence supports that the primary event is follicular hyperkeratosis and obstruction, [ 4 ] but the term hidradenitis supperativa has continued to be used in ...
True cysts are rare in those with acne, and the term severe nodular acne is now the preferred terminology. [25] Acne inversa (L. invertō, "upside-down") and acne rosacea (rosa, "rose-colored" + -āceus, "forming") are not forms of acne and are alternate names that respectively refer to the skin conditions hidradenitis suppurativa (HS) and rosacea.
A boil, also called a furuncle, is a deep folliculitis, which is an infection of the hair follicle. It is most commonly caused by infection by the bacterium Staphylococcus aureus, resulting in a painful swollen area on the skin caused by an accumulation of pus and dead tissue. [1] Boils are therefore basically pus-filled nodules. [2]
Furunculosis (boil) Gas gangrene (clostridial myonecrosis, myonecrosis) Glanders (equinia, farcy, malleus) Gonococcemia (arthritis–dermatosis syndrome, disseminated gonococcal infection) Gonorrhea (clap) Gram-negative folliculitis; Gram-negative toe web infection
Carbuncles and boils are types of abscess that often involve hair follicles, with carbuncles being larger. [9] A cyst is related to an abscess, but it contains a material other than pus, and a cyst has a clearly defined wall. Abscesses can also form internally on internal organs and after surgery. They are usually caused by a bacterial ...
A sebaceous cyst is a term commonly used to refer to either: [1] Epidermoid cysts (also termed epidermal cysts, infundibular cyst) Pilar cysts (also termed trichelemmal cysts, isthmus-catagen cysts) Both of the above types of cysts contain keratin, not sebum, and neither originates from sebaceous glands.
[3] [4] Infection causes inflammation and the development of pus. [2] Whether a skin condition classifies as acne depends on the number of comedones and infection. [4] Comedones should not be confused with sebaceous filaments. Comedo-type ductal carcinoma in situ (DCIS) is not related to the skin conditions discussed here. DCIS is a noninvasive ...