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**If features of squamous differentiation are present one calls ''urothelial carcinoma with squamous features''. | **If features of squamous differentiation are present one calls ''urothelial carcinoma with squamous features''. | ||
† Willner ''et al.'' require the following:<ref name=pmid33088909>{{cite journal |vauthors=Willner J, Matloob A, Colanta A, Khader SN |title=Educational Case: Urothelial Carcinoma: An Overview of Pathologic Diagnosis |journal=Acad Pathol |volume=7 |issue= |pages=2374289520958172 |date=2020 |pmid=33088909 |doi=10.1177/2374289520958172 |url=}}</ref> | † Willner ''et al.'' require all of the following:<ref name=pmid33088909>{{cite journal |vauthors=Willner J, Matloob A, Colanta A, Khader SN |title=Educational Case: Urothelial Carcinoma: An Overview of Pathologic Diagnosis |journal=Acad Pathol |volume=7 |issue= |pages=2374289520958172 |date=2020 |pmid=33088909 |doi=10.1177/2374289520958172 |url=}}</ref> | ||
#Nucleus-to-cytoplasm ratio >0.7. | #Nucleus-to-cytoplasm ratio >0.7. | ||
#Hyperchromasia (moderate or severe). | #Hyperchromasia (moderate or severe). |
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