Implementing the Paris System into Reclassifying Urine Cytology: A Descriptive Analysis

Background: The Paris system (TPS) is an attempt to standardize and validate the terminology used in Urine cytology reporting as it is an essential screening test for HGUC. This study was implemented to reclassify the archived cases at our institution using TPS to find consensus between the two and assess the clinical utility of TPS in classifying equivocal cases with 'Atypia'. Materials and Methods: Archived cases of two years (n=164) were reassessed and classified as per TPS and evaluated for Correlation with Histopathology (wherever available). Results: Category VI and V had good consensus, with 60% PPV for HGUC (Category VI) with histopathology diagnosis. Conclusion: Wide case range and correlation data required for accurate assessment, nevertheless TPS has been a successful tool in correctly classifying the equivocal cases of "Atypia? and HGUC , thus facilitating effective clinical management.