Urine cytology

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Author: Mikael Häggström [note 1]

Normal urothelial cells.

Clinical information

It is not necessary to look through more than readily available reports from previous urine cytologies.


Mainly look for:

The Paris System for reporting urine cytology, version 2.0.[2]

The N/C ratios apply to the finding of any cells meeting the criteria, and not the average among atypical cells (in the majority of obviously positive cases, N/C/ratio averages 0.5).[2] When there are obvious features of malignancy, there is no need to hunt for cells that fulfil all criteria to make such diagnosis.[2]


  1. For a full list of contributors, see article history. Creators of images are attributed at the image description pages, seen by clicking on the images. See Patholines:Authorship for details.

Main page


  1. Wang Y, Auger M, Kanber Y, Caglar D, Brimo F (2018). "Implementing The Paris System for Reporting Urinary Cytology results in a decrease in the rate of the "atypical" category and an increase in its prediction of subsequent high-grade urothelial carcinoma. ". Cancer Cytopathol 126 (3): 207-214. doi:10.1002/cncy.21958. PMID 29278461. Archived from the original. . 
  2. 2.0 2.1 2.2 - Image by Mikael Häggström. Reference: Wojcik EM, Kurtycz DFI, Rosenthal DL (2022). "We'll always have Paris The Paris System for Reporting Urinary Cytology 2022. ". J Am Soc Cytopathol 11 (2): 62-66. doi:10.1016/j.jasc.2021.12.003. PMID 35094954. Archived from the original. . 

Image sources