Tumoral subtypes

Articles

• 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. (...)

• 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 (...)

• thymoma type B1
  7 October 2010

  lymphocyte-rich thymoma
  Definition: Type B1 thymoma closely resembles normal thymus cytologically and architecturally. It is usually an encapsulated mass with fibrous bands (seen here) separating it into nodules or lobules. It has areas resembling normal thymic cortex which are composed of scattered epithelial cells in a dense background of immature T-cells. Foci of medullary differentiation (seen here as lighter areas) with or without Hassall’s corpuscles are always present.
  Given the (...)

• 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 (...)

• chondroblastic osteosarcoma
  26 May 2009

  Digital cases
  Case 115 : Chondroblastic osteosarcoma of the calcaneum
  Definition : Chondroblastic osteosarcoma (OS) accounts for about 25% of all cases of OS.
  Localization
  flat bones
  temporal bone (#20730902#)
  Macroscopy
  Grossly, an overt chondroid appearance is rare. This is probably secondary to the cartilage component being less well-formed, high grade, and mixing with non-chondroid elements resulting in a lack of large areas of pure chondroid differentiation and its attendant (...)

• 3p-associated familial renal cell carcinoma
  15 June 2005

  References
  Microarray based analysis of 3p25-p26 deletions (3p- syndrome). Shuib S, McMullan D, Rattenberry E, Barber RM, Rahman F, Zatyka M, Chapman C, Macdonald F, Latif F, Davison V, Maher ER. Am J Med Genet A. 2009 Oct;149A(10):2099-105. PMID: #19760623#
  Bonne AC, Bodmer D, Schoenmakers EF, van Ravenswaaij CM, Hoogerbrugge N, van Kessel AG. Chromosome 3 translocations and familial renal cell cancer. Curr Mol Med. 2004 Dec;4(8):849-54. PMID: #15579032#
  Bodmer D, Eleveld M, (...)

• noninvasive urothelial carcinoma of the bladder With glandular differentiation
  26 May 2009

  Noninvasive urothelial carcinoma (UC) with glandular differentiation in the absence of infiltrating carcinoma is a rare entity.
  References
  Noninvasive Urothelial Carcinoma of the Bladder With Glandular Differentiation: Report of 24 Cases. Miller JS, Epstein JI. Am J Surg Pathol. 2009 May 13. PMID: #19440144#

• fibrous cortical defect
  4 January 2010

  metaphyseal fibrous defect

• cellular schwannoma
  7 July 2007

  Digital slides
  JRC:357 : Cellular Schwannoma - Retroperitoneum.
  JRC:96 : Cellular Schwannoma - Groin.
  JRC:14942 : Cellular Schwannoma - Peritoneum (retroperitoenum).
  JRC:485 : Cellular Schwannoma - Peritoneum.
  JRC:15245 : Cellular Schwannoma - Peritoneum.
  UPMC:518
  Definition: The cellular variant of schwannoma (cellular schwannoma), mostly found in the deeper tissues, has been described.
  Cellular schwannoma, described by Woodruff in 1981, is considered a variant of (...)

• papillary renal cell carcinoma with lipocyte-like cells
  28 October 2010

  Papillary renal cell carcinoma (PRCC) is the second most common carcinoma of the kidney, which is classified into two types.
  Type 1 displays single layer of cells with scanty pale cytoplasm and type 2 has pseudostratified high-grade nuclei with eosinophilic cytoplasm.
  Recently, apart from these two types, oncocytic PRCC and clear-cell PRCC have been described.
  Lipocyte-like cells might represent a special type of PRCC or this feature may be an indication of poor prognosis regarding its (...)

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