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==Microscopic== | ==Microscopic== | ||
Features:<ref name=pmid21080874/> | Features - either: | ||
#Micropapillae:<ref name=pmid21080874/> | |||
#*Nipple-like structures without fibrovascular cores. | |||
#The invasive pattern of ''micropapillary urothelial carcinoma'' is nests of tumour cells with clefting to the surrounding stroma. | |||
*+/-Conventional [[urothelial carcinoma]] ( | *+/-Conventional [[urothelial carcinoma]] (common). | ||
Notes: | Notes: | ||
*In other organs, [[adenocarcinoma]] would be in the differential diagnosis. It should be noted that (primary) [[adenocarcinoma of the urinary bladder]] looks quite different than ''micropapillary urothelial carcinoma''. | |||
*In other organs, [[adenocarcinoma]] would be in the differential diagnosis. It should be noted that [[adenocarcinoma of the urinary bladder]] looks quite different than ''micropapillary urothelial carcinoma''. | *Quantity of micropapillary pattern (percentage) is variable.<ref name=pmid25673582/> | ||
DDx: | DDx: |
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