Welcome to the Paris System for Reporting Urinary Cytology Online Atlas!

The purpose of this atlas is to offer instructive images with explanatory text to illustrate the features of the Paris system for practitioners and trainees alike. Additionally, this site will provide an opportunity for real-time updates of terminology and criteria. This website is a companion to the Paris System for Reporting Urinary Cytology 2016 print atlas. It includes all the images from the atlas, and more, but because of its nature as an online image atlas, it does not duplicate the text or detail of the print version.


  • Search: Search for images by chapter, figure number, preparation type, or keyword.
  • PIRST Histograms: articipant results are displayed for the 74 images included in the 2015-2016 Paris Inter-observer Reproducibility Study (PIRST), in which over 800 participants rendered their diagnostic opinions on Atlas images. This popular feature of the prior website allows users to compare what they see in the image with the evaluations of their peers.
  • Self-test: We invite you to participate in a self-test, which incorporates a subset of images from the atlas and additional donated images. This test will be periodically updated. The results of the self-test are only for the edification of users.
  • Online Image Donation: We encourage you to donate images that you think are especially noteworthy. Our team will review the images and if they show features that are instructive, challenging, or are just excellent we will place them on the site alongside the images from the Atlas. Help make this atlas a truly shared resource.
  • Future growth: We plan to continue to add images regularly, including whole slide imaging of instructional cases, and more. Visit regularly as the site continues to grow.

The site and the print atlas represents the work of a large number of people from private, public and academic facilities who are dedicated to serving our patients. We thank them and the staff of the American Society of Cytopathology for all their efforts.

PARIS 2016 Website Committee:
Co-Chairs: Daniel F. I. Kurtycz, and Matthew T. Olson
Members: Guliz A. Barkan, Dorothy L. Rosenthal, Christopher J. VandenBussche, Eva M. Wojcik