C. Tissular pathology

• mucosal ulceration
  20 January

  Images
  Dual pathology of maxillary buccal mucosa: HSV ulceration & histoplasmosis https://twitter.com/bunn_belinda/status/792941340074078212
  Gastric mucosal ulceration https://twitter.com/RhondaYantiss/status/854673825216245760
  Localization
  colorectal mucosal ulceration colonic mucosal ulceration rectal mucosal ulceration
  gastric mucosal ulceration / gastric ulcer
  See also
  mucosa mucosal (...)

• nuclear arrangement
  20 January

  Examples
  nuclear palisading

• adenomyosis
  17 January

  Localization
  uterine adenomyosis
  adenomyosis of the gallbladder
  See also
  epithelial anomalies
  smooth muscle anomalies

• histiocytic infiltration
  13 January

  Images
  histiocytic infiltration in atypical mycobacteriosis https://twitter.com/HGongoraJaraMD/status/799857814864859136
  See also
  cellular infiltration
  histiocytoses

• neurocytic rosette
  13 January

  See also
  rosettes

• pineocytomatous rosette
  13 January

  See also
  rosettes

• perivascular pseudrosette
  13 January

  See also
  rosettes

• pathologic hyperplasia
  9 January

  Most forms of pathologic hyperplasia are caused by excessive hormonal stimulation or growth factors acting on target cells. Example: endometrial hyperplasia
  Pathologic hyperplasia, however, constitutes a fertile soil in which cancerous proliferation may eventually arise. Thus, patients with hyperplasia of the endometrium are at increased risk for developing endometrial cancer.
  Hyperplasia is also an important response of connective tissue cells in wound healing, in which proliferating (...)

• compensatory hyperplasia
  9 January

  The source of growth factors in compensatory hyperplasia and the stimuli for the production of these growth factors are less well defined. The increase in tissue mass after some types of cell loss is achieved not only by proliferation of the remaining cells but also by the development of new cells from stem cells. For instance, in the liver, intrahepatic stem cells do not play a major role in the hyperplasia that occurs after hepatectomy but they may participate in regeneration after (...)

• hormonal hyperplasia
  9 January

  Hormonal hyperplasia is best exemplified by the proliferation of the glandular epithelium of the female breast at puberty and during pregnancy and the physiologic hyperplasia that occurs in the pregnant uterus. The experimental model of partial hepatectomy has been especially useful in examining the mechanisms that stimulate proliferation of residual liver cells and regeneration of the liver. Similar mechanisms are likely involved in other situations when remaining tissue grows to make up (...)

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