Difference between revisions of "Low-grade squamous intraepithelial lesion"

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Features:<ref name=Ref_PBoD1075-6>{{Ref PBoD|1075-6}}</ref>
Features:<ref name=Ref_PBoD1075-6>{{Ref PBoD|1075-6}}</ref>
*"Koilocytic atypia":<ref name=Ref_GP146>{{Ref GP|146}}</ref>
*"Koilocytic atypia":<ref name=Ref_GP146>{{Ref GP|146}}</ref>
**Cytoplasmic halos.
**Clear cytoplasmic halos (perinuclear clearing).
**Nuclear enlargement >=3:1 enlarged nucleus:normal nucleus.
**Nuclear enlargement.
**Nuclear membrane irregularities.
***Classically >=3:1 enlarged nucleus:normal nucleus.
**Nuclear hyperchromasia.
***May be mild (superficial cells = size of basal cells).
**Nuclear membrane irregularities - '''important'''.
**Nuclear hyperchromasia - '''important'''.
**Coarse chromatin.
**Coarse chromatin.
**Binucleation may be seen (cytopathic effect of [[HPV]]).<ref name=pmid11491378>{{cite journal |author=Roteli-Martins CM, Derchain SF, Martinez EZ, Siqueira SA, Alves VA, Syrjänen KJ |title=Morphological diagnosis of HPV lesions and cervical intraepithelial neoplasia (CIN) is highly reproducible |journal=Clin Exp Obstet Gynecol |volume=28 |issue=2 |pages=78–80 |year=2001 |pmid=11491378 |doi= |url=}}</ref>
**+/-Binucleation may be seen (cytopathic effect of [[HPV]]).<ref name=pmid11491378>{{cite journal |author=Roteli-Martins CM, Derchain SF, Martinez EZ, Siqueira SA, Alves VA, Syrjänen KJ |title=Morphological diagnosis of HPV lesions and cervical intraepithelial neoplasia (CIN) is highly reproducible |journal=Clin Exp Obstet Gynecol |volume=28 |issue=2 |pages=78–80 |year=2001 |pmid=11491378 |doi= |url=}}</ref>
***Useful when present.


Note:
Note:
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Koilocytes:
Koilocytes:
*Perinuclear clearing.
*Perinuclear clearing.
*Nuclear changes.  
**Halo should be crystal clear.
*Nuclear changes - '''key feature'''.  
**Size similar (or larger) to those in the basal layer of the epithelium.
**Size similar (or larger) to those in the basal layer of the epithelium.
**Nuclear enlargement should be evident on low power, i.e. 25x. <ref>V. Dube 2008.</ref>
***Nuclear enlargement should be evident on low power, i.e. 25x.<ref>V. Dube 2008.</ref>
**Central location - nucleus should be smack in the middle of the cell.
**Nuclear hyperchromasia.
 
**Central location - nucleus should be in the middle of the cell.
Notes:
***Benign cells have a small nucleus that is peripheral.
# Both perinuclear clearing and nuclear changes are essential.
# Benign cells have a small nucleus that is peripheral.


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