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The swelling may feel fluid-filled when pressed. [1] The area of redness often extends beyond the swelling. [8] 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 ...
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]
The cyst wall is composed of squamous epithelium (90%), columnar cells with or without cilia, or a mixture of both, with lymphoid infiltrate, often with prominent germinal centers and few subcapsular lymph sinuses. The cyst is typically surrounded by lymphoid tissue that has attenuated or absent overlying epithelium due to inflammatory changes.
Folliculitis keloidalis scarring on the nape of the neck is most common among males with curly hair. Oil folliculitis is inflammation of hair follicles due to exposure to various oils, and typically occurs on forearms or thighs. It is common in refinery workers, road workers, mechanics, and sheep shearers. Even makeup may cause it.
Scrofula caused by NTM, on the other hand, responds well to surgery, but is usually resistant to antibiotics. [citation needed] The affected nodes can be removed either by repeated aspiration, curettage or total excision (with the risk in the latter procedure, however, often causing unsightly scarring, damage to the facial nerve, or both).
A carbuncle is a cluster of several boils, which is typically filled with purulent exudate (dead neutrophils, phagocytized bacteria, and other cellular components). [5] Fluid may drain freely from the carbuncle, or intervention involving an incision and drainage procedure may be needed. [ 4 ]
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Bezold's abscess is an abscess deep to the sternocleidomastoid muscle where pus from mastoiditis erodes through the cortex of the mastoid part of the temporal bone, medial to the attachment of sternocleidomastoid, extends into the infratemporal fossa, and deep to the investing layer of the deep cervical fascia.