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==Microscopy== | ==Microscopy== | ||
Histologic definition - papilla: | Histologic definition - papilla: | ||
*Nipple-shaped structure | *Nipple-shaped structure consisting of epithelium on a fibrovascular core. | ||
**''Fibrovascular core'' = fibrous tissue + least one blood vessel. | **''Fibrovascular core'' = fibrous tissue + least one blood vessel. | ||
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