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Difference between revisions of "Papillary"
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[[Image:Papillary adenocarcinoma of the lung -- high mag.jpg|thumb|right|300px|Papillae in the papillary variant of [[lung adenocarcinoma]]. [[H&E stain]]. (WC/Nephron)]] | |||
[[Image:Well-differentiated papillary mesothelioma -- intermed. mag.jpg|thumb|right|300px|[[Well-differentiated papillary mesothelioma]]. [[H&E stain]]. (WC/Nephron)]] | |||
[[Image:Papillary renal cell carcinoma -- very high mag.jpg|thumb|right|300px|[[Papillary renal cell carcinoma]]. [[H&E stain]]. (WC/Nephron)]] | |||
In [[pathology]], '''papillary''' refers to a nipple-like projection with a fibrovascular core. | In [[pathology]], '''papillary''' refers to a nipple-like projection with a fibrovascular core. | ||
== | ''Papillary pattern'' redirects here. | ||
==General== | |||
*Common histomorphologic pattern that is seen in a large number of contexts. | |||
==Microscopy== | |||
Histologic definition - papilla: | |||
*Nipple-shaped structure consisting of epithelium on a fibrovascular core. | |||
**''Fibrovascular core'' = fibrous tissue + least one blood vessel. | |||
Note: | |||
*May be associated with [[psammoma bodies]]. | |||
DDx: | |||
*Micropapilla - nipple-shaped structure without blood vessels; usually smaller than papillae. | |||
*Pseudopapilla - cells distant from the blood vessels undergo [[necrosis]] imparting a papillary-like appearance, e.g. [[solid pseudopapillary tumour]]. | |||
==Some entities with the word ''papillary''== | |||
===Breast pathology=== | ===Breast pathology=== | ||
*[[Invasive papillary carcinoma of the breast]]. | *[[Invasive papillary carcinoma of the breast]]. | ||
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===Gastrointestinal pathology=== | ===Gastrointestinal pathology=== | ||
*[[Solid and papillary epithelial neoplasm]]. | *[[Solid and papillary epithelial neoplasm]] - actually ''pseudopapillary''; also known as ''solid pseudopapillary tumour''. | ||
*[[Intraductal papillary mucinous tumour]]. | *[[Intraductal papillary mucinous tumour]]. | ||
*Biliary intraductal papillary neoplasm. | *Biliary intraductal papillary neoplasm. | ||