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 (...)

• 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 (...)

• ductular reaction
  25 June 2003

  neoductular proliferation, portal ductal proliferation, ductular proliferation

• bone marrow infiltration
  21 November 2004

  bone marrow cellular infiltration; bone marrow cellular infiltrate
  Patterns of bone marrow infiltration
  focal nodular bone marrow infiltration
  paratrabecular bone marrow infiltration
  interstitial bone marrow infiltration
  diffuse bone marrow infiltration
  intrasinusoidal bone marrow infiltration
  Types
  blastic infiltration of bone marrow (leukemias )
  histiocytic infiltration of bone marrow bone marrow localizatiuon of histiocytoses lysosomal storage disorders (...)

• Langhans cells
  1 June 2004

  Langhans cells

• amyloid stroma
  29 October 2004

  Etiology
  neuroendocrine tumors thyroid medullary carcinoma adrenal pheochromocytoma (40-70%) (#1544665#)

• gliomatosis peritonei
  23 August 2004

  Definition: Gliomatosis peritonei is characterized by the occurrence of nodules of mature glial tissues in the peritoneum.
  Gliomatosis peritonei is a rare condition that occurs almost exclusively in the setting of ovarian immature teratoma.
  It is controversial whether glial tissues are derived from maturation of the associated teratomatous tissue that has implanted in the peritoneum, or glial differentiation of subperitoneal stem cells.
  Associations
  mature teratoma
  immature teratoma (...)

• adrenal cytomegaly
  18 January 2006

  Definition: Adrenal cytomegaly is characterized by the presence of large polyhedral cells with eosinophilic granular cytoplasm and enlarged nuclei in the adrenal cortex. Adrenal cytomegaly is found in 0.8% pediatric autopsies.
  Adrenal cytomegaly is relatively common finding within fetal cortex in newborns, particularly premature infants (3-7%) or infants with Rh incompatibility.
  Adrenal cytomegaly may be associated with Beckwith-Wiedemann syndrome
  Focal adrenal cytomegaly can be observed (...)

• eosinophilic granuloma
  5 July 2004

  localized osseous Langerhans cell histiocytosis

0 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | ... | 230