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**Stromal nuclear pleomorphism - usually low grade. | **Stromal nuclear pleomorphism - usually low grade. | ||
**WHO criteria: 2+ mitoses / 10 HPF -- definition suffers from [[HPFitis]]. | **WHO criteria: 2+ mitoses / 10 HPF -- definition suffers from [[HPFitis]]. | ||
***Mitotic rate criteria often ignored as mitotically inactive | ***Mitotic rate criteria often ignored as mitotically inactive tumours metastasize.<ref name=pmid20179434/> | ||
*Benign glands with an abnormal shape. | *Benign glands with an abnormal shape. | ||
*"Cambium layer" = increased cellularity around the epithelial elements.<ref name=pmid20179434/><ref name=medilexicon_cambium/> | *"Cambium layer" = increased cellularity around the epithelial elements.<ref name=pmid20179434/><ref name=medilexicon_cambium/> |
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