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Difference between revisions of "Pleomorphic adenoma"
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*Proliferation of myoepithelium and epithelium (ductal cells) in mesenchymal stroma. | *Proliferation of myoepithelium and epithelium (ductal cells) in mesenchymal stroma. | ||
**Cells in ducts = epithelial. | **Cells in ducts = epithelial. | ||
**Cells not in ducts = myoepithelial.<ref name=IW_10jan2011> | **Cells not in ducts = myoepithelial.<ref name=IW_10jan2011>Weinreb I. 10 January 2011.</ref> | ||
*Mesenchymal stroma - '''important feature'''. | *Mesenchymal stroma - '''important feature'''. | ||
**May be any of following: [[myxoid stroma|myxoid]], mucochondroid, hyalinized, osseous, fatty. | **May be any of following: [[myxoid stroma|myxoid]], mucochondroid, hyalinized, osseous, fatty. | ||
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Notes: | Notes: | ||
*Mesenchymal stroma not required for diagnosis -- if >5% ducts.<ref name=IW_10jan2011> | *Mesenchymal stroma not required for diagnosis -- if >5% ducts.<ref name=IW_10jan2011>Weinreb I. 10 January 2011.</ref> | ||
**No chondroid stroma ''and'' <5% ductal cells = '''[[myoepithelioma]]'''. | **No chondroid stroma ''and'' <5% ductal cells = '''[[myoepithelioma]]'''. | ||
*Complete excision is often elusive; stating "completely excised" on a surgical pathology report is unwise. | *Complete excision is often elusive; stating "completely excised" on a surgical pathology report is unwise. | ||