Welcome to the Bethesda System for Reporting Gynecologic Cytology Online Atlas!

The purpose of this atlas is to offer instructive images with explanatory text to illustrate the features of the Bethesda system for practitioners and trainees alike. Additionally, this site will provide an opportunity for real-time updates of terminology and criteria from previous print versions of the system. This website is a companion to the Bethesda System for Reporting Gynecologic Cytology 2014 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.
  • BIRST Histograms: Participant results are displayed for the 85 images included in the 2014 Bethesda Inter-observer Reproducibility Study (BIRST), 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.

Bethesda 2014 Website Committee:
Co-Chairs: Daniel F. I. Kurtycz, and Paul N. Staats
Members: Deborah Chute, Maria Friedlander, Sara Monoco, Donna Russell
Advisors: Ritu Nayar, David Wilbur