Macroscopy

Articles

• thymoma type A
  7 December 2012

  Spindle cell thymoma. Thymoma, type A.
  Definition: Type A thymoma (also known as Spindle Cell Thymoma) is composed of bland spindle or oval epithelial cells admixed with few or no lymphocytes. *
  Images
  Type A thymoma (also known as Spindle Cell Thymoma)
  https://twitter.com/smlungpathguy/status/856687119540027394
  Type A thymomas generally have a thick fibrous capsule as shown here. Prominent fibrous bands course through the tumor separating it into lobules.
  Type A thymoma is the (...)

• abscess
  9 June 2004

  abcesses
  Definition: Abscesses are localized collections of purulent inflammatory tissue caused by suppuration buried in a tissue, an organ, or a confined space. They are produced by deep seeding of pyogenic bacteria into a tissue.
  Abscesses have a central region that appears as a mass of necrotic leukocytes and tissue cells. There is usually a zone of preserved neutrophils around this necrotic focus, and outside this region vascular dilation and parenchymal and fibroblastic proliferation (...)

• plexiform neurofibroma
  28 December 2006

  PO
  Definition: Plexiform neurofibroma is the least common of neurofibromas. Plexiform neurofibroma occurs almost exclusively in patients with neurofibromatosis type 1 (NF1) and they are often multiple.
  Many of them occur in a superficial location but they can also occur in deep locations.
  Images
  gallbladder plexiform neurofibroma https://twitter.com/ARP_Press/status/793143254824910848
  Digital cases
  HPC:105 : Plexiform neurofibroma NF1
  HPC:401 : Palpebral plexiform neurofibroma (...)

• cystic fibrosis
  27 June 2003

  mucoviscidosis

• pleural empyema
  30 November 2005

  WKP
  Definition: Pleural empyema (also known as a pyothorax or purulent pleuritis) is an accumulation of pus in the pleural cavity.
  Most pleural empyemas arise from a bacterial infection within the lung (pneumonia), often associated with parapneumonic effusions.
  There are three stages: exudative, fibrinopurulent and organizing. In the exudative stage, the pus accumulates. This is followed by the fibrinopurulent stage in which there is loculation of the pleural fluid (the creation of pus (...)

• placenta circumvallata
  3 December 2004

  Circumvallate placenta ; placenta circumvallate
  Images
  circumvallate insertion - membranes away from edge, with circumferential fibrous ridge https://twitter.com/E_Heidi_Cheek/status/870832986056470528 Wikimedia
  Types
  partial placenta circumvallata
  complete placenta circumvallata
  See also
  placenta placenta extrachorialis placenta macroscopical anomalies

• 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 (...)

• ectrodactyly
  31 August 2004

  split-hand malformation, split-foot malformation, split-hand/split-foot malformation (SHFM), absence of fingers, split hand

• testicular tumors
  23 August 2004

  Classification
  testicular germ cell tumors testicular seminoma testicular teratoma testicular embryonal carcinoma testicular yolk sac tumor (testicular endodermal sinus tumor ) testicular choriocarcinoma testicular mixed germ cell tumor
  sex cord-stromal tumors Sertoli-stromal cell tumors Sertoli cell tumors (Sertoli cell adenoma ) large cell calcifying Sertoli cell tumor Sertoli-Leydig cell tumor Leydig cell tumor (Ledydig cell adenoma ) granulosa-stromal cell tumors adult-type (...)

• aortic dissection in Marfan disease
  10 December 2007

  See also
  aortic dissection
  Marfan disease Marfan syndrome-associated aortic disease

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