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 (...)

• 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 (...)

• 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 (...)

• fibrous dysplasia
  3 December 2003

  fibrous dysplasia of bones; osseous fibrous dysplasia
  Definition: Fibrous dysplasia is a skeletal developmental anomaly of the bone-forming mesenchyme that manifests as a defect in osteoblastic differentiation and maturation. Virtually any bone in the body can be affected. It is a nonhereditary disorder of unknown cause.
  Images
  Fibrous dysplasia of bone
  https://twitter.com/KUSAURAP/status/738883221824245760
  https://twitter.com/drsys02/status/857135375495688193 (...)

• 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

• 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 (...)

• bone marrow lymphocytosis
  8 December 2003

  Increased number of lymphoid cells in bone marrow
  Etiology
  Reactive
  infections
  drug therapy
  immune disorders
  hematogones
  lymphoid aggregates
  polyclonal immunoblastic reactions
  Neoplastic
  acute lymphoblastic leukemia / focal lymphoblastic lymphoma
  chronic lymphocytic leukemia
  hairy cell leukemia
  prolymphocytic leukemia, B and T cell
  Burkitt leukemia or lymphoma
  non-hodgkin lymphoma, B and T cell
  large granular lymphocytosis
  myeloma
  Waldenstrom (...)

• intimal fibrosis
  12 March 2004

  fibrous intimal thickening, concentric intimal thickening, fibrous intimal thickening

• 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

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