C. Tissular pathology

• von Hansemann histiocytes
  28 September

  von Hansemann histiocyte
  In malakoplakia https://twitter.com/GladellPaner/status/1574732105392672768

• mononuclear phagocyte system
  23 August

  reticuloendothelial system WKP
  Definition : In immunology, the mononuclear phagocyte system or mononuclear phagocytic system (MPS) also known as the reticuloendothelial system or macrophage system is a part of the immune system that consists of the phagocytic cells located in reticular connective tissue.
  The cells are primarily monocytes and macrophages, and they accumulate in lymph nodes and the spleen. The Kupffer cells of the liver and tissue histiocytes are also part of the MPS. (...)

• extracellular compartment
  23 August

  Pathology
  pathology of collagen
  pathology of elastin
  pathology of basement membranes
  pathology of proteoglycans
  extracellular accumulations amyloidosis calcifications / calcium deposits

• cellular compartment
  23 August

  cellular compartments
  In developement
  Developmental compartments can be simply defined as separate, different, adjacent cell populations, which upon juxtaposition, create a lineage boundary.
  This lineage boundary prevents cell movement from cells from different lineages across this barrier, restricting them to their compartment.
  Subdivisions are established by morphogen gradients and maintained by local cell-cell interactions, providing functional units with domains of different (...)

• organismal phenotype
  23 August

  WKP
  Definition: The organismal phenotype is the appearance of an organism with respect to a particular character or group of characters (physical, biochemical, and physiologic).
  It is a result of the interaction of its genotype and its environment. This term is often used to define the consequences of a particular mutation.
  See also
  cellular phenotype
  tissular phenotype
  phenotype
  phenotypic expression
  standardized phenotyping protocols
  phenotypic changes (...)

• 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 (...)

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