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*Ki-67 high. | *Ki-67 high. | ||
Benign urothelium | Benign urothelium versus CIS:<ref name=pmid16932015>{{Cite journal | last1 = Yin | first1 = H. | last2 = He | first2 = Q. | last3 = Li | first3 = T. | last4 = Leong | first4 = AS. | title = Cytokeratin 20 and Ki-67 to distinguish carcinoma in situ from flat non-neoplastic urothelium. | journal = Appl Immunohistochem Mol Morphol | volume = 14 | issue = 3 | pages = 260-5 | month = Sep | year = 2006 | doi = | PMID = 16932015 }}</ref> | ||
*CK20 +ve in deep cells (23/26 cases). | *CK20 +ve in deep cells (23/26 cases). | ||
**Normal urothelium -- only the umbrella cells. | **Normal urothelium -- only the umbrella cells. | ||
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*CD44 -ve.<ref name=pmid24225842>{{Cite journal | last1 = Aron | first1 = M. | last2 = Luthringer | first2 = DJ. | last3 = McKenney | first3 = JK. | last4 = Hansel | first4 = DE. | last5 = Westfall | first5 = DE. | last6 = Parakh | first6 = R. | last7 = Mohanty | first7 = SK. | last8 = Balzer | first8 = B. | last9 = Amin | first9 = MB. | title = Utility of a triple antibody cocktail intraurothelial neoplasm-3 (IUN-3-CK20/CD44s/p53) and α-methylacyl-CoA racemase (AMACR) in the distinction of urothelial carcinoma in situ (CIS) and reactive urothelial atypia. | journal = Am J Surg Pathol | volume = 37 | issue = 12 | pages = 1815-23 | month = Dec | year = 2013 | doi = 10.1097/PAS.0000000000000114 | PMID = 24225842 }}</ref> | *CD44 -ve.<ref name=pmid24225842>{{Cite journal | last1 = Aron | first1 = M. | last2 = Luthringer | first2 = DJ. | last3 = McKenney | first3 = JK. | last4 = Hansel | first4 = DE. | last5 = Westfall | first5 = DE. | last6 = Parakh | first6 = R. | last7 = Mohanty | first7 = SK. | last8 = Balzer | first8 = B. | last9 = Amin | first9 = MB. | title = Utility of a triple antibody cocktail intraurothelial neoplasm-3 (IUN-3-CK20/CD44s/p53) and α-methylacyl-CoA racemase (AMACR) in the distinction of urothelial carcinoma in situ (CIS) and reactive urothelial atypia. | journal = Am J Surg Pathol | volume = 37 | issue = 12 | pages = 1815-23 | month = Dec | year = 2013 | doi = 10.1097/PAS.0000000000000114 | PMID = 24225842 }}</ref> | ||
**Positive in ''indeterminant'' and ''negative''. | **Positive in ''indeterminant'' and ''negative''. | ||
===Images=== | |||
<gallery> | |||
Image: Urothelial carcinoma in situ - CK20 -- intermed mag.jpg | UCIS - CK20 - intermed. mag. | |||
Image: Urothelial carcinoma in situ - CK20 -- high mag.jpg | UCIS - CK20 - high mag. | |||
Image: Urothelial carcinoma in situ - CK20 -- very high mag.jpg | UCIS - CK20 - very high mag. | |||
Image: Benign urothelium - CK20 -- high mag.jpg | Benign urothelium - CK20 - high mag. | |||
</gallery> | |||
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