Microscopical anomalies

Articles

• metaplasia
  11 July 2003

  Definition: Metaplasia is the reversible replacement of one differentiated cell type with another differentiated cell type.
  Metaplasia causes precursor cells to change their cell fate, and do not change existing differentiated cells.
  Metaplasia is reversible and usually occurs in response to chronic irritation and inflammation and allows for substitution of cells that are better able to survive under circumstances in which a more fragile cell type might succumb.
  Metaplasia is a (...)

• hypertrophy
  3 June 2003

  Definition: Hypertrophy refers to an increase in the size of cells, resulting in an increase in the size of the organ.
  Pathogenesis
  The hypertrophied organ has no new cells, just larger cells. The increased size of the cells is due not to cellular swelling but to the synthesis of more structural components.
  Cells capable of division may respond to stress by undergoing both hyperplasia and hypertrophy, whereas in nondividing cells (e.g., myocardial fibers), hypertrophy occurs.
  Nuclei (...)

• bridging necrosis
  27 January 2004

  Definition: Bridging necrosis is the term given to confluent necrosis linking terminal venules to portal tracts. The term "Bridging necrosis" has been used for necrosis linking any of the vascular structures, but it is now more often restricted to the linking of terminal hepatic venules (centrilobular veins) to portal tracts (central-portal bridging necrosis).
  Bridging necrosis describes the location rather than the type of necrosis. It usually results from extensive necrosis of confluent (...)

• intimal fibrosis
  12 March 2004

  fibrous intimal thickening, concentric intimal thickening, fibrous intimal thickening

• suppurative granuloma
  26 April 2004

  tuberculoid granuloma with central suppuration, suppurative tuberculoid granuloma, suppurative granuloma; suppurative epithelioid granuloma; abscess-forming granulomatous lymphadenitis
  Etiology
  chalazion
  chronic granulomatous disease (MIM.306400)
  bacterial infections cat scratch disease lymphogranuloma venereum tularemia Yersinia infection actinomycosis
  mycobacterial infection
  fungal infections blastomycosis nocardiosis
  Links
  http://granuloma.homestead.com/suppurative.html (...)

• ballooned hepatocytes
  25 January 2004

  ballooning degeneration of hepatocytes, hepatocyte ballooning degeneration, hepatocyte ballooning; hepatocytic ballooning
  Etiology
  acute viral hepatitis
  giant cell hepatitis
  alcoholic hepatitis
  drug-induced hepatitis
  hepatic transplantation

• hepatocytic steatosis
  25 June 2003

  fatty change, hepatic steatosis, steatotic liver
  Images
  A 15 y.o. girl with Lysosomal Acid Lipase Deficiency. Liver. HE MT CD68 https://twitter.com/francesc_riu/status/847500260545048576
  Digital cases
  HPC:402 : Steatosis and hemosiderosis after parenteral nutrition
  Types
  predominantly macrovesicular steatosis
  microvesicular steatosis
  nonalcoholic steatohepatitis (NASH)
  See also
  steatohepatitis alcoholic steatohepatitis non-alcoholic (...)

• steatosis
  13 December 2004

  Localization
  enterocytic steatosis
  hepatocytic steatosis
  adrenal steatosis
  myocytic steatosis cardiomyocytic steatosis rhabdomyocytic steatosis
  See also
  cellular lesions cytoplasmic anomalies
  lipid vacuoles

• ductular reaction
  25 June 2003

  neoductular proliferation, portal ductal proliferation, ductular proliferation

• colonic cryptitis
  29 May 2004

  colonic glandulitis
  Etiology (Examples)
  IBDs Crohn colitis ulcerative colitis
  acute colitis infectious colitis
  See also
  colonic mucosal anomalies colonic cryptic anomalies

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