The main purpose of urine cytology is to detect high-grade urothelial carcinoma. With this principle in mind, The Paris System (TPS) Working Group, composed of cytopathologists, surgical pathologists, and urologists, has proposed and published a standardized reporting system that includes
specific diagnostic categories and cytomorphologic criteria for the reliable diagnosis of high-grade urothelial carcinoma. This paper outlines the essential elements of TPS and the process that led to the formation and rationale of the reporting system. TPS Working Group, organized at the
2013 International Congress of Cytology, conceived a standardized platform on which to base cytologic interpretation of urine samples. The widespread dissemination of this approach to cytologic examination and reporting of urologic samples and the scheme’s universal acceptance by pathologists
and urologists is critical for its success. For urologists, understanding the diagnostic criteria, their clinical implications, and limitations of TPS is essential if they are to utilize urine cytology and noninvasive ancillary tests in a thoughtful and practical manner. This is the first
international/inclusive attempt at standardizing urinary cytology. The success of TPS will depend on the pathology and urology communities working collectively to improve this seminal paradigm shift, and optimize the impact on patient care.
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The Paris System;
standardized reporting terminology;
Document Type: Research Article
Departments of Pathology
Department of Pathology, Northwestern Memorial Hospital, Chicago, IL
Institute of Pathology, University Hospital Basel, Basel, Switzerland
Urology, Loyola University Healthcare Systems, Maywood
Department of Pathology and Laboratory Medicine, University of Wisconsin School of Medicine and Public Health, Wisconsin State Laboratory of Hygiene, Madison, WI
Department of Pathology, The Johns Hopkins University, Baltimore, MD
July 1, 2016