Orphan tumors

Articles

• ameloblastic fibroma
  10 April 2006

  Definition: Ameloblastic fibroma is a proliferation of immature odontogenic mesenchymal and epithelial cells. No mineralization or production of enamel, dentin or cementum is seen.
  Images
  ameloblastic fibroma
  http://www.webpathology.com/image.asp?case=660&n=1
  https://twitter.com/kimmmzms/status/491952553110691840
  http://www.webpathology.com/image.asp?n=2&Case=165
  Cases
  December 2007, Case 712-1, Department of Pathology, University of Oklahoma Health Sciences Center, (...)

• odontoameloblastoma
  21 May 2008

  Odontoameloblastomas are extremely rare oral tumors. For the cases that have been described, they happen to occur in the mandible of young patients.
  In contrast to AF, they are destructive lesions on radiographs and have calcifying components.
  Histologically, these tumors have ameloblastomatous component as wlee as odontoma-like components.
  Biologically, they tend to behave like ameloblastoma and characterized by multiple recurrence and local aggression.
  See also
  ameloblastic (...)

• rhabdomyomas
  10 November 2004

  rhabdomyoma
  Images
  cardiac rhabdomyoma in 2 week old female : Spider cells : Large polygonal cells with glycogen vacuoles https://twitter.com/bestpathologist/status/700584984663318528
  See also
  rhabdomyoblasts
  cardiomyocytes
  Digital slides
  Case 49 (HPC:49)
  Case 64 (HPC:64)
  Localization
  cardiac rhabdomyoma
  head and neck rhabdomyoma (#8319954#) parapharyngeal rhabdomyoma (#1530111#) multifocal rhabdomyoma of the neck (#2764225#)
  cutaneous fetal rhabdomyoma (#18300799#) (...)

• ectomesenchymoma
  29 February 2008

  malignant ectomesenchymoma

• metanephric adenofibroma
  27 October 2003

  nephrogenic adenofibroma

• adenoid cystic carcinoma
  9 August 2004

  WKPD WKMD
  Definition : A type of glandular carcinoma (adenocarcinoma ).
  Images
  salivary adenoid cystic carcinoma https://twitter.com/KUSAURAP/status/767963906270633984 https://twitter.com/yasminelys/status/726363368819404800 https://twitter.com/AssaadAM/status/738137110457110532 https://twitter.com/drshahinhameed/status/796235475006558209
  adenoid cystic carcinoma with high grade transformation. S100-, SOX10+ https://twitter.com/chioseasi/status/745017579698270208
  Adenoid Cystic (...)

• giant cell angioblastoma
  11 February 2004

  Locally aggressive soft-tissue tumor.
  Microscopy
  solid, nodular, and plexiform proliferation of oval-to-spindle cells
  frequent striking, concentric aggregation around small vascular channels
  nodular cell clusters resembling inflammatory granulomas
  giant, multinucleated cells.
  Histogenesis
  cellular aggregates were interpreted as distorted attempts at formation of vessels.
  Immunochemistry
  stromal cells positive for factor XIIIa
  stromal cells positive for histocompatability (...)

• Clara cell adenoma
  14 June 2006

  See also
  Clara cells

• ameloblastic fibro-odontoma
  21 May 2008

  ameloblastic fibroodontoma

• sucutaneous angiolipoma
  14 June 2004

  Lipohemangioma
  Definition: Angiolipomas are typically subcutaneous and often painful.
  Images
  Angiolipoma: "angio" component; painful; intravasc thrombi https://twitter.com/JRamirezMD/status/811189246442741760
  Digital slides
  UI:738 - Subcutaneous angiolipoma (Lipohemangioma)
  Subtypes
  cellular angiolipoma
  Histogenesis
  Because they lack the typical cytogenetic abnormalities seen in ordinary lipomas, some have speculated that they may actually be of vascular origin but with an (...)

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