The Essentials in Cytopathology series publishes generously illustrated and user-friendly guides with over 100 full color images that illustrate principles and practice in Cytopathology for pathologists and clinicians. Cytologic Detection of Urothelial Lesions by Dorothy L. Rosenthal, MD and Stephen S. Raab, MD is the second volume in the series. This volume will present a simple approach to dealing with cellular samples from the urinary tract.