Book excerpt: The primary thrust of this atlas is a comparison between different diagnostic entities with cytologic findings summarized in tabulated forms. The book contains over 3,200 full color photographs that illustrate the criteria for the cytology described. The Color Atlas of Differential Diagnosis in Exfoliative and Aspiration Cytopathology is an excellent reference for everyday use when difficult and challenging cases face both cytotechnologists and pathologists. A tabulated form of information saves valuable time while reporting cytopathology.