Microscopy

Articles

• hydatiform mole
  28 April 2004

  molar gestation; hydatiform moles WKP
  Images
  partial hydatiform mole by Ed Euthman
  complete hydatiform mole https://twitter.com/luishcruzc/status/738155933801418752 https://twitter.com/KUSAURAP/status/778827207976230916
  Definition: Hydatiform mole is a gestational trophoblastic disorder.
  Accurate diagnosis and classification of hydatidiform mole (HM) are important because the risk of persistent gestational trophoblastic disease, including choriocarcinoma, is significantly (...)

• Cryptococcus neoformans
  29 August 2005

  Torula histolytica
  Definition: Cryptococcus neoformans (formerly known as Torula histolytica) is an encapsulated yeast-like fungus found in dried avian (particularly pigeon) and bat excreta, and in dust contaminated with such droppings.
  Images
  Cryptococcus disseminated to lung, spleen, kidney, thyroid.
  https://twitter.com/JMGardnerMD/status/866107567046610945
  granuloma with Cryptococcus neoformans
  https://twitter.com/smlungpathguy/status/877392725959749632
  Digital cases
  HPC:62 (...)

• foamy macrophages
  24 October 2003

  spumous macrophages, foamy macrophages, foam cells; lipid-laden histiocytes, foamy histiocytes; lipid-laden macrophages; foamy histiocyte; foamy histiocytes; xanthomatous histiocytes
  Definition: Histiocytes that are laden with lipid (predominantly cholesterol ), and that have differentiated from circulating monocytes.
  Images
  foamy macrophages in lung; amiodarone exposure
  https://twitter.com/smlungpathguy/status/715529010176999424
  In tumors
  giant cell tumor of tendinous sheath (...)

• Niemann-Pick diseases
  16 October 2003

  Niemann-Pick disease, NPDs

• acute appendicitis
  2 September 2004

  Digital cases
  HPC:25 : acute appendicitis
  HPC:94 : acute appendicitis
  HPC:368 : Granulation tissue after acute appendicitis
  Videos
  Acute appendicitis (by Washington Deceit)
  Peri-appendiceal abscess (by Washington Deceit)
  Laparoscopic appendicectomy
  See also
  appendicectomy (videos)
  References
  Lamps LW. Appendicitis and infections of the appendix. Semin Diagn Pathol. 2004 May;21(2):86-97. PMID: #15807469#
  References
  Minimal added value of further blocks in negative (...)

• embryonal carcinoma
  8 November 2004

  WP
  Definition: Embryonal carcinoma is relatively common among testicular germ cell tumors, where 10% are pure embryonal carcinomas and even more have it as a component of a mixed germ cell tumor. For unknown reasons, embryonal carcinoma is rare among ovarian germ cell tumors.
  Images
  Macroscopy https://twitter.com/smlungpathguy/status/724787493422288896
  Microscopy https://twitter.com/BellaMicheleang/status/854359563679797248
  Embryonal carcinoma is relatively common among (...)

• hepatoblastoma
  16 March 2004

  hepatoblastomas
  Definition: Hepatoblastoma is a malignant embryonal liver tumor that occurs almost exclusively in infants and very young children.
  Image
  Macroscopy : https://twitter.com/DraEosina/status/762631086207893506
  Cytology: https://twitter.com/AdamGomezMD/status/720632495671087104
  https://twitter.com/MArnold_PedPath/status/736000944303808512
  Hepatoblastoma is composed of epithelial and mesenchymal elements in varying proportions and at various stages of differentiation. The (...)

• Hirschsprung disease
  6 October 2003

  Hirschsprung’s disease, congenital intestinal aganglionosis, digestive aganglionnosis; digestive aganglionoses PO1 PO2
  Definition: Aganglionic megacolon is associated with congenital absence of intrinsic ganglion cells in the myenteric (Auerbach) and submucosal (Meissner) plexuses of the gastrointestinal tract. The disorder is genetically heterogeneous.
  Digital cases
  HPC:90 : rectal mucosa biopsies
  HPC:98 : rectal mucosa biopsies
  HPC:151 : Hirschsprung disease - Rectal (...)

• acute inflammation
  1 June 2004

  Digital cases
  Case 25 (HPC:25) : Acute appendicitis
  Case 94 (HPC:94) : Acute appendicitis
  Case 13 (HPC:13) : Acute synovitis
  Definition: Acute inflammation is a rapid response to an injurious agent that serves to deliver mediators of host defense-leukocytes and plasma proteins-to the site of injury.
  Types - Lesional patterns
  acute inflammation
  congestive inflammation
  cellular acute inflammation
  suppurative inflammation / suppuration
  abcess / abcesses / abcedation (...)

• necrosis
  9 November 2004

  tissular death

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