Difference between revisions of "Neurothekeoma"

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'''Neurothekeoma''' is a benign [[peripheral nerve sheath tumours|peripheral nerve sheath tumour]].
'''Neurothekeoma''' is a benign [[peripheral nerve sheath tumours|peripheral nerve sheath tumour]].


It is also known as '''myxoma of the nerve sheath''' and '''nerve sheath myxoma'''.<ref name=pmid11070116>{{Cite journal  | last1 = Laskin | first1 = WB. | last2 = Fetsch | first2 = JF. | last3 = Miettinen | first3 = M. | title = The "neurothekeoma": immunohistochemical analysis distinguishes the true nerve sheath myxoma from its mimics. | journal = Hum Pathol | volume = 31 | issue = 10 | pages = 1230-41 | month = Oct | year = 2000 | doi = 10.1053/hupa.2000.18474 | PMID = 11070116 }}</ref>
It is also known as '''nerve sheath myxoma'''<ref name=pmid11070116>{{Cite journal  | last1 = Laskin | first1 = WB. | last2 = Fetsch | first2 = JF. | last3 = Miettinen | first3 = M. | title = The "neurothekeoma": immunohistochemical analysis distinguishes the true nerve sheath myxoma from its mimics. | journal = Hum Pathol | volume = 31 | issue = 10 | pages = 1230-41 | month = Oct | year = 2000 | doi = 10.1053/hupa.2000.18474 | PMID = 11070116 }}</ref> and '''myxoma of the nerve sheath'''.


There is growing evidence that neurothekomas and dermal nerve sheath myxomas are distinct entities.<ref>{{Cite journal  | last1 = Sheth | first1 = S. | last2 = Li | first2 = X. | last3 = Binder | first3 = S. | last4 = Dry | first4 = SM. | title = Differential gene expression profiles of neurothekeomas and nerve sheath myxomas by microarray analysis. | journal = Mod Pathol | volume = 24 | issue = 3 | pages = 343-54 | month = Mar | year = 2011 | doi = 10.1038/modpathol.2010.203 | PMID = 21297585 }}</ref>
There is growing evidence that neurothekomas and dermal nerve sheath myxomas are distinct entities.<ref>{{Cite journal  | last1 = Sheth | first1 = S. | last2 = Li | first2 = X. | last3 = Binder | first3 = S. | last4 = Dry | first4 = SM. | title = Differential gene expression profiles of neurothekeomas and nerve sheath myxomas by microarray analysis. | journal = Mod Pathol | volume = 24 | issue = 3 | pages = 343-54 | month = Mar | year = 2011 | doi = 10.1038/modpathol.2010.203 | PMID = 21297585 }}</ref>
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*Vimentin +ve.
*Vimentin +ve.
*CD10 +ve.  
*CD10 +ve.  
*Microphthalmia transcription factor +ve.
*[[Microphthalmia transcription factor]] (MITF) +ve.
*PGP9.5 +ve.
*PGP9.5 +ve.
 
*S100 +ve.<ref name=RefDerm541>{{Ref Derm|541}}</ref>
Exclusionary:
**-ve in older literature.
*S100 -ve/+v3 (-ve in older literature).
**Myxoid variant +ve. {{fact}}


==See also==
==See also==

Latest revision as of 15:29, 5 November 2021

Neurothekeoma is a benign peripheral nerve sheath tumour.

It is also known as nerve sheath myxoma[1] and myxoma of the nerve sheath.

There is growing evidence that neurothekomas and dermal nerve sheath myxomas are distinct entities.[2]

General

  • Rare.
  • Female > male.

Microscopic

Features:[3]

  • Superficial dermal lesion:
    • Usu. lobulated or micronodular architecture - key feature.
      • +/-Focal sheeting.
    • Spindle/epithelioid morphology with pale eosinophilic cytoplasm - key feature.
    • +/-Inflammation around lesion.
    • +/-Surrounded by collagen.

Notes:

  • No atypia.
  • Mitoses rare/none.
  • Often poorly circumscribed.

Subtypes:[4]

  • Cellular.
  • Myxoid.
  • Intermediate.

DDx:

Images

  • Neurothekeoma (WP)

www

IHC

Features:[3]

  • NKI/C3 (AKA NKI-C3) +ve.
  • NSE +/-ve.

Others:[6]

See also

References

  1. ↑ Laskin, WB.; Fetsch, JF.; Miettinen, M. (Oct 2000). "The "neurothekeoma": immunohistochemical analysis distinguishes the true nerve sheath myxoma from its mimics.". Hum Pathol 31 (10): 1230-41. doi:10.1053/hupa.2000.18474. PMID 11070116.
  2. ↑ Sheth, S.; Li, X.; Binder, S.; Dry, SM. (Mar 2011). "Differential gene expression profiles of neurothekeomas and nerve sheath myxomas by microarray analysis.". Mod Pathol 24 (3): 343-54. doi:10.1038/modpathol.2010.203. PMID 21297585.
  3. ↑ 3.0 3.1 Hornick JL, Fletcher CD (March 2007). "Cellular neurothekeoma: detailed characterization in a series of 133 cases". Am. J. Surg. Pathol. 31 (3): 329–40. doi:10.1097/01.pas.0000213360.03133.89. PMID 17325474.
  4. ↑ Wang AR, May D, Bourne P, Scott G (November 1999). "PGP9.5: a marker for cellular neurothekeoma". Am. J. Surg. Pathol. 23 (11): 1401–7. PMID 10555009.
  5. ↑ URL: http://surgpathcriteria.stanford.edu/softfib/angiomatoid_fibrous_histiocytoma/. Accessed on: 11 May 2011.
  6. ↑ Fetsch JF, Laskin WB, Hallman JR, Lupton GP, Miettinen M (July 2007). "Neurothekeoma: an analysis of 178 tumors with detailed immunohistochemical data and long-term patient follow-up information". Am. J. Surg. Pathol. 31 (7): 1103–14. doi:10.1097/PAS.0b013e31802d96af. PMID 17592278.
  7. ↑ Busam, Klaus J. (2009). Dermatopathology: A Volume in the Foundations in Diagnostic Pathology Series (1st ed.). Saunders. pp. 541. ISBN 978-0443066542.
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