The subspecialty of Cytopathology is 60 years old and has become established as a solid and reliable discipline in medicine. As expected, cytopathology literature has expanded in a remarkably short period of time, from a few textbooks prior to the 1980’s to a current library of texts and journals devoted exclusively to cytomorphology that is substantial. Essentials in Cytopathology does not presume to replace any of the distinguished textbooks in Cytopathology. Instead, the series will publish generously illustrated and user-friendly guides for both pathologists and clinicians.