Tumoral subtypes

Articles

• non-ossifying fibroma
  8 September 2004

  Fibrous cortical defect, cortical defect, nonossifying fibroma; non-ossifying fibroma; benign fibrous histiocytoma if mass-forming and involving the medullary cavity. NOF
  Definition: Non-ossifying fibroma is a benign, lytic lesion of fibrous origin most often observed in the metaphyseal region of the long bones in children and adolescents.
  Images
  Non-ossifying fibroma / NOF
  https://twitter.com/Maryross86/status/860657829203648512 (...)

• uterine endometrioid adenocarcinoma, FIGO grade 1
  25 November 2010

  type 1 endometrial carcinoma
  Definition: Relatively indolent tumors that arise in background of endometrial hyperplasia.
  According to one definition, when endometrial glands show a confluent pattern occupying at least 2x2 mm focus, the diagnosis of adenocarcinoma can be made. Smaller foci are labeled "complex endometrial hyperplasia".
  The diagnosis of endometrioid adenocarcinoma can also be made if there is extensive papillary pattern or infiltrative glands with desmoplastic response. (...)

• plexiform schwannoma
  14 September 2005

  plexiform cellular schwannoma

• superficial spreading melanoma
  30 October 2006

  SSM, superficial spreading melanoma in situ

• lentigo maligna melanoma
  21 February 2005

  lentigo maligna; Dubreuilh melanosis
  Images
  lentigo maligna; Dubreuilh melanosis
  https://twitter.com/phmckee1948/status/845930300349788161
  starburst giant cell in lentigo maligna melanoma
  https://twitter.com/NimaArdakaniMD/status/830282684765069312
  Atypical cells in lentigo maligna intraepidermic melanoma v small regular cells of dermal nevus
  https://twitter.com/Tenonhospital/status/854393704504848384 Digital slides
  UI:1832 - melanoma in situ (lentigo maligna)
  Lentigo (...)

• post-chemotherapy Wilms tumor
  24 March 2007

  Digital cases
  Case 54 (HPC:54) : Post-chemotherapy Wilms tumor in Beckwith-Wiedemann syndrome
  Case 82 (HPC:82) : Regressive Wilms tumor (post-chemotherapy)
  See also
  Wilms tumor
  renal tumors

• congenital teratoma
  7 April 2005

  References
  Heerema-McKenney A, Harrison MR, Bratton B, Farrell J, Zaloudek C. Congenital teratoma: a clinicopathologic study of 22 fetal and neonatal tumors. Am J Surg Pathol. 2005 Jan;29(1):29-38. PMID: #15613854#

• cystic Wilms tumor
  16 April 2008

  cystic nephroblastoma

• thymoma type B2
  7 December 2012

  Definition: Type B2 thymoma is composed of clusters of neoplastic epithelial cells in a background of abundant immature T-cells. The epithelial cell density is higher than that seen in type B1 thymoma or the normal thymus. Foci of medullary differentiation may or may not be seen. It makes up 25% to 30% of all thymomas.
  This image shows thick fibrous septa dividing the tumor into lobules.
  Type B2 thymoma is usually seen in adults in their 5th or 6th decade of life. Almost 55% of patients (...)

• anaplastic Wilms tumor
  10 January 2006

  Definition: Anaplasia in Wilms tumor.
  Images
  Anaplasia in Wilms tumor = 3x nuclear enlargement with hyperchormasia (L) and multipolar mitotic figure (R) https://twitter.com/MArnold_PedPath/status/844573460470939649
  Types
  Wilms tumor with focal anaplasia
  Wilms tumor with diffuse anaplasia
  References
  Faria P, Beckwith JB, Mishra K, Zuppan C, Weeks DA, Breslow N, Green DM. Focal versus diffuse anaplasia in Wilms tumor—new definitions with prognostic significance: a report from (...)

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