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**Basal location. | **Basal location. | ||
Criteria for invasion:<ref name=pmid22510761>{{Cite journal | last1 = Toll | first1 = AD. | last2 = Epstein | first2 = JI. | title = Invasive low-grade papillary urothelial carcinoma: a clinicopathologic analysis of 41 cases. | journal = Am J Surg Pathol | volume = 36 | issue = 7 | pages = 1081-6 | month = Jul | year = 2012 | doi = 10.1097/PAS.0b013e318253d6e0 | PMID = 22510761 }}</ref> | Criteria for invasion (mnemonic ''PISS-R''):<ref name=pmid22510761>{{Cite journal | last1 = Toll | first1 = AD. | last2 = Epstein | first2 = JI. | title = Invasive low-grade papillary urothelial carcinoma: a clinicopathologic analysis of 41 cases. | journal = Am J Surg Pathol | volume = 36 | issue = 7 | pages = 1081-6 | month = Jul | year = 2012 | doi = 10.1097/PAS.0b013e318253d6e0 | PMID = 22510761 }}</ref> | ||
*[[Stromal reaction]]. | *[[Stromal reaction]]. | ||
*Infiltrating single cells. | *Infiltrating single cells. | ||
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Note: | Note: | ||
*Not currently used diagnostically. | *Not currently used diagnostically. | ||
==Sign out== | ==Sign out== | ||
<pre> | <pre> |
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