Tumor

Articles

• pigmented spindle cell nevus
  1 July 2004

  pigmented spindle cell nevus of Reed

• lentigo simplex
  8 July 2004

  The simple lentigo is a brown to black, sharply circumscribed and usually uniformly pigmented macule, measuring a few millimeters in diameter. It may be found anywhere on the body surface.
  The term ‘labial melanotic macule’ is now used for a clinically similar lesion on the lip that was previously referred to as a lentigo.
  Microscopy
  There is variable basal hyperpigmentation with an increased number of single melanocytes in the basal layer.
  There is usually acanthosis, with regular (...)

• combined nevus
  1 July 2004

  Histopathology:
  symmetric, well circumscribed
  2 or more of the following;
  — common nevus
  — blue nevus or other pigmented dendritic melanocytes
  — Spitz nevus (epithelioid and spindle cell nevus)
  — pigmented spindle and epithelioid cells
  — amelanotic spindle cells
  ordinary nevus component overlies/adjacent to other component
  deep involvement occurs
  plexiform configuration on occasion
  Differential:
  cellular blue nevus
  melanoma
  Return to: melanocytic (...)

• actinic keratosis
  6 July 2004

  solar keratosis, senile keratosis, pre-epitheliomatous keratosis WKP
  Digital cases
  UI:906 - Actinic keratosis.
  UI:917 - Actinic keratosis.
  UI:1826- Actinic keratosis.
  JRC:10567 : Actinic keratosis.
  JRC:10569 : Actinic keratosis.
  Definition: Actinic keratosis is a premalignant condition of thick, scaly, or crusty patches of skin
  It is more common in fair-skinned people and it is associated with those who are frequently exposed to the sun, as it is usually accompanied by (...)

• teratoma
  10 March 2004

  teratomas
  Definition: Teratomas are neoplasms comprised of mixed elements derived from the three germ cell layers.
  Teratoma is a complex tumor composed of a collection of heterogeneous cells and/or organoid structures reminiscent of normal derivatives of the germ cell.
  It occurs in both male and female genital systems and other organs along the midline of the body, with similar morphology and classification.
  Ovarian teratomas constitute 15%-20% of all ovarian tumors.
  Benign mature (...)

• deep-penetrating nevus
  1 July 2004

  plexiform spindle cell nevus

• progressive transformation of germinal centers
  15 December 2003

  PTGC, progressive transformation of germinal center

• mature teratoma
  8 November 2004

  Videos
  mature ovarian teratoma
  See also
  teratomas mature teratoma (dermoid cyst ) immature teratoma malignant teratoma
  germ cell tumors (GCTs )
  References
  Is a mature teratoma a premalignant condition? Hawkins EP. Hum Pathol. 1999 May;30(5):596. PMID: #10333236#

• Ewing sarcoma
  21 May 2004

  Ewing tumor, Ewing tumour
  Images
  Ewing’s sarcoma https://twitter.com/MArnold_PedPath/status/740720267647942656 https://twitter.com/histiocytosisX/status/779419664120152064 https://twitter.com/histiocytosisX/status/880130635909799936 https://twitter.com/twins1120/status/1481796624464683008
  Digital cases (Digital slides)
  HPC:31 : Ewing sarcoma
  HPC:132 : Ewing sarcoma
  HPC:182 : Ewing sarcoma
  HPC:376 : EWSR1-FLI1+ bone-forming Ewing sarcoma (EWSR1-FLI1+ small cell osteosarcoma) (...)

• RICH
  9 June 2004

  rapidly involuting congenital hemangioma

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