C. Tissular pathology

• transitional epithelium
  22 August

  WKP
  Definition : Transitional epithelium is a type of stratified epithelium.
  Transitional epithelium is a type of tissue that changes shape in response to stretching (stretchable epithelium). The transitional epithelium usually appears cuboidal when relaxed and squamous when stretched.
  This tissue consists of multiple layers of epithelial cells which can contract and expand in order to adapt to the degree of distension needed.
  Examples
  urothelium
  in sinonasal (...)

• suppurative inflammation
  22 August

  Examples
  suppurative cholecystitis
  suppurative appendicitis
  suppurative pneumonia
  suppurative hidradenitis

• pus
  22 August

  WKP
  Definition : Pus is an exudate, typically white-yellow, yellow, or yellow-brown, formed at the site of inflammation during bacterial or fungal infection.
  An accumulation of pus in an enclosed tissue space is known as an abscess, whereas a visible collection of pus within or beneath the epidermis is known as a pustule, pimple or spot.
  Pus consists of a thin, protein-rich fluid (historically known as liquor puris) and dead leukocytes from the body’s immune response (mostly (...)

• Hamazaki-Wesenberg bodies
  3 August

  Images
  https://commons.wikimedia.org/wiki/File:Hamazaki-Wesenberg_bodies_lymph_node.JPG

• diverticulum
  5 June

  MeSH:D004240 WKP
  Definition : a diverticulum is an outpouching of a hollow structure (or a fluid-filled structure ) in the body.
  Depending upon which layers of the structure are involved, diverticula are described as being either true diverticulum or false diverticulum .
  In medicine, the term usually implies the structure is not normally present, but in embryology, the term is used for some normal structures arising from others, as for instance the thyroid diverticulum, which (...)

• cytoplasmic coloration
  5 June

  Examples
  eosinophilic cytoplasm
  basophilic cytoplasm
  clear cytoplasm
  See also
  cytoplasmic appearance

• bland squamous cells
  5 June

  Examples
  keratoacanthoma
  See also
  bland cells
  squamous cells

• cystic cavity with endothelial bording cells
  29 April

  Examples
  cystic lymphangioma
  synovial cyst
  See also
  cystic cavity
  endothelial cells

• fasciitis
  29 April

  Types
  ischemic fasciitis
  necrotizing fasciitis

• Fournier gangrene
  29 April

  WKP
  Definition : Fournier gangrene is a type of necrotizing cellulitis or gangrene affecting the external genitalia or perineum. It commonly occurs in older men, but it can also occur in women and children. It is more likely to occur in diabetics, alcoholics, or those who are immunocompromised.
  Etiology
  Most cases of Fournier gangrene are infected with both aerobic and anaerobic bacteria such as Clostridium perfringens. It can also result from infections caused by group A (...)

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