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. (...)

• 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 (...)

• fibrous cortical defect
  4 January 2010

  metaphyseal fibrous defect

• verrucous hemangioma
  14 March 2005

  Definition: The term verrucous hemangioma has been used to describe a congenital vascular anomaly with a progressive verrucous epidermal surface persisting throughout life unless surgically excised.
  Verrucous hemangioma are reminiscent of infantile hemangioma with GLUT1 immunopositivity, particularly in its involutive phase. No firm conclusion seems possible as to whether verrucous hemangioma is a malformation or an indolent tumor, but clinical evidence favors the former category. (...)

• 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 (...)

• translocation-associated undifferentiated small cell hepatoblastoma
  19 January 2006

  Cytogenetics
  t(10;22) (#1384017#)
  t(22;22)(q11;q13) (#12010372#)
  References
  Undifferentiated small cell hepatoblastoma with a chromosomal translocation t(22;22)(q11;q13). Gunawan B, Schafer KL, Sattler B, Lorf T, Dockhorn-Dworniczak B, Ringe B, Fuzesi L. Histopathology. 2002 May;40(5):485-7. PMID: #12010372#
  Small cell undifferentiated histology in hepatoblastoma may be unfavorable. Haas JE, Feusner JH, Finegold MJ. Cancer. 2001 Dec 15;92(12):3130-4. PMID: #11753992# (...)

• mixed epithelial and mesenchymal hepatoblastoma
  19 January 2006

  Definition: mixed hepatoblastoma represents 44% of hepatoblastomas.
  Images
  Liver tumor in an infant.Both fetal hepatocytes and bone in a single core: mixed hepatoblastoma. https://twitter.com/DraEosina/status/761515200109547520
  Subtypes
  with teratoid features
  See also
  hepatoblastomas

• well-differentiated fetal hepatoblastoma
  19 January 2006

  See also
  hepatoblastomas epithelial hepatoblastoma

• embryonal hepatoblastoma
  27 September 2005

  Images
  https://twitter.com/MArnold_PedPath/status/736000944303808512
  See also
  hepatoblastoma epithelial hepatoblastoma fetal hepatoblastoma

• solid pseudopapillary tumor of the pancreas with multinucleated giant tumor cells
  17 December 2012

  Solid pseudopapillary neoplasm of the pancreas with prominent atypical multinucleated giant tumour cells
  Solid pseudopapillary neoplasm of the pancreas (SPN) is a rare low-grade malignant neoplasm. SPN with prominent atypical multinucleated giant tumour cells (MNGTCs) has been very rarely reported.
  The presence of MNGTCs in SPN most probably represents degenerative change of the tumour cells and does not seem to affect the prognosis.
  Reference
  Solid pseudopapillary neoplasm of the (...)

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