An advanced atlas/text concentrating on common diagnostic problems and frequent pitfalls found in diagnostic cytology. Provides an advanced level of diagnostic information covering a broad range of cytologic material. Also includes discussion and pictures comparing and contrasting different diagnoses and unusual cases and how to avoid false positive and negative diagnoses. Stresses criteria and concepts necessary to make differential diagnosis. Topics include pediatric cytopathology, preparatory techniques and artifacts, and newer specialized procedures such as liquid pap smear collection and molecular techniques.