Difference between revisions of "CNS cytopathology"

From Libre Pathology
Jump to navigation Jump to search
Line 11: Line 11:
{{familytree | C01 | | | | C02 | | C03 | | | | C04 | |C01=Glial|C02=Non-glial|C03=Infectious|C04=Non-infectious }}
{{familytree | C01 | | | | C02 | | C03 | | | | C04 | |C01=Glial|C02=Non-glial|C03=Infectious|C04=Non-infectious }}
{{familytree/end}}
{{familytree/end}}
{| class="wikitable"
|
| Glial
| Non-glial
|-
| Stranding <br>(cytoplasmic)
| thin - cannot be seen at low <br>power (2.5x obj.), true cytoplasmic <br>processes
| thick - can be seen at low <br>power (2.5x obj.), artifact of smearing
|-
| Edge of cluster
| smooth/non-distinct
| sharp
|}


Glial vs non-glial:
Glial vs non-glial:
*Glial has glial strands (stringy processes) ~ 1-2 micrometers thick.
*Glial has ctyoplasmic processes/cytoplasmic strands (stringy processes) ~ 1 micrometer thick.
**They cannot be seen well at low power.
**Cotton candy-like appearance.
**Images:
**Images:
*** [http://www.msdlatinamerica.com/ebooks/DiagnosticNeuropathologySmears/files/cf76aad0d9dab70c99b93186ca8b3ad4.gif Stringy processes - glial tumour (msdlatinamerica.com)].<ref name=latinam>URL: [http://www.msdlatinamerica.com/ebooks/DiagnosticNeuropathologySmears/sid117213.html http://www.msdlatinamerica.com/ebooks/DiagnosticNeuropathologySmears/sid117213.html]. Accessed on: 2 November 2010.</ref>
*** [http://www.msdlatinamerica.com/ebooks/DiagnosticNeuropathologySmears/files/cf76aad0d9dab70c99b93186ca8b3ad4.gif Stringy processes - glial tumour (msdlatinamerica.com)].<ref name=latinam>URL: [http://www.msdlatinamerica.com/ebooks/DiagnosticNeuropathologySmears/sid117213.html http://www.msdlatinamerica.com/ebooks/DiagnosticNeuropathologySmears/sid117213.html]. Accessed on: 2 November 2010.</ref>

Revision as of 13:28, 5 November 2010

CNS cytopathology is a subset of neuropathology and cytopathology.

An introduction to cytopathology is in the cytopathology article. Cerebrospinal (CSF) specimens are dealt with in a separate article called CSF cytopathology.

Basic approach

 
 
 
 
 
 
 
 
CNS cytology
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Tumour
 
 
 
 
 
 
 
Non-tumour
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Glial
 
 
 
Non-glial
 
Infectious
 
 
 
Non-infectious
 
Glial Non-glial
Stranding
(cytoplasmic)
thin - cannot be seen at low
power (2.5x obj.), true cytoplasmic
processes
thick - can be seen at low
power (2.5x obj.), artifact of smearing
Edge of cluster smooth/non-distinct sharp

Glial vs non-glial:

Notes:

  • Crush artifact (in smear preparation) can mimic glial processes.
    • Crush artifact vs. real glial processes:
      • No glial processes run perpendicular to the direction of smear.
      • Glial processes may branch.
      • Crushed/elongated nuclei are present in artifactual processes.

Metastatic carcinoma

Things that don't smear well

Cohesive tumours:

Things that smear well

Dyscohesive tumours:[4]

  • Lymphoma.
  • Pituitary adenoma.
  • Oligodendroglioma.

See also

References

  1. 1.0 1.1 URL: http://www.msdlatinamerica.com/ebooks/DiagnosticNeuropathologySmears/sid117213.html. Accessed on: 2 November 2010.
  2. URL: http://moon.ouhsc.edu/kfung/JTY1/NeuroTest/Q92-Ans.htm. Accessed on: 3 November 2010.
  3. 3.0 3.1 Ironside JW (August 1994). "Update on central nervous system cytopathology. II. Brain smear technique". J. Clin. Pathol. 47 (8): 683–8. PMC 502135. PMID 7962615. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC502135/.
  4. 4.0 4.1 4.2 4.3 Weedman Molavi, Diana (2008). The Practice of Surgical Pathology: A Beginner's Guide to the Diagnostic Process (1st ed.). Springer. pp. 252. ISBN 978-0387744858.

External links