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glossary:pyoderma

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glossary:pyoderma [2008/05/16 06:14]
Pat O'Connor
glossary:pyoderma [2012/10/16 14:40] (current)
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 +====== Pyoderma ======
  
 +Any purulent [[skin]] [[disease]] or any [[pus]] forming infection of the skin.
 +
 +===== Etiology Pyoderma =====
 +
 +An infection of the skin, pyoderma is is seen as an [[inflammatory]] destructive disease that is frequently of unknown origin. [[Bacteria]],​ primarily staphyloccocal ([[Staphylococci]])organisms,​ may be cultured although in many cases the bacterial cause may be elusive. This is due to the fact that often the bacteria that is cultured is normal resident flora of the skin.
 + 
 +Pyoderma can be divided into the following classifications:​ surface, superficial,​ and deep. It is also defined as being of a primary or secondary [[infection]]. ​
 +
 +==== Surface pyodermas ====
 +are called such because bacteria present on the skin, and involved in the infections, are confined to the surface of the skin.
 +
 +==== Primary pyoderma ====
 +is often ideopathic in nature (occurring without any predisposing cause), and may be a result of suppressed or compromised immune states. If bacterial infection is involved it is usually one organism as opposed to mixed or more than one organisms such as in deep pyodermas. ​
 +
 +==== Superficial pyoderma ====
 +(sometimes seen as a [[cellulitis]] affecting the layer of skin at the level of the hair follicle) and secondary pyoderma are often related to other conditions that are present, such as ecto-[[parasite]] infestation,​ fungal infections, atopic or contact type allergic responses, immunologic or endocrine diseases like diabetes, hypothyroidism,​ or hypoadrenocorticism. ​
 +
 +==== Deep pyodermas ====
 +are just as the name suggests, extending well beneath the level of the hair follicle ([[http://​www.lymphedemapeople.com/​thesite/​lymphedema_and_necrotizing_fasciitis.htm|necrotizing fascitis]]/​flesh-eating disease is a deep pyoderma). Abscesses, tunneling of the skin, ulcerative (and necrotic) lesions, lesions with serosanguinous crusting and [[pus]], and hair loss may be among the signs that are seen. 
 +
 +Excoriated skin [[lesion]]s vary in size and are often supperative having a sero-sanguinous type of weeping or drainage. Although it is most likely to be seen in areas of the skin that are likely to have the most exposure to warmth and moisture. They can be found on other areas of the body as well. In these areas higher bacteria counts are likely to be seen on culture. ​
 +
 +The length of the therapy will be based on successful elimation of whatever is causing the irritant. Pyodermas are difficult to resolve and many tend to reoccur. Treatment tends to be long term. 
 +
 +==== Pyoderma gangrenosum (PG) ====
 +is an uncommon ulcerative [[cutaneous]] condition of uncertain etiology. PG was first described in 1930. It is associated with systemic [[disease]]s in at least 50% of patients who are affected. The diagnosis is made by excluding other causes of similar appearing [[cutaneous]] ulcerations,​ including [[infection]],​ [[malignancy]],​ vasculitis, collagen vascular diseases, [[http://​www.lymphedemapeople.com/​thesite/​lymphedema_and_diabetes.htm|diabetes]],​ and [[trauma]]. Ulcerations of PG may occur after trauma or injury to the [[skin]] in 30% of patients; this process is termed pathergy.
glossary/pyoderma.txt ยท Last modified: 2012/10/16 14:40 (external edit)