The big (Lever) book is a fairly comprehensive account of disease entities organized by pathogenesis or type. For the student or non-specialist attempting to make a diagnosis of an unknown skin disease from a slide, this approach is less useful because many completely unrelated conditions look similar under the microscope. The Synopsis/Atlas was developed to address the diagnostic process from this perspective, and it is organized according to patterns and cell types (morphology) to help readers formulate a differential diagnosis for a given case. The book is organized according to patterns of disease as visualized on a microscopic slide. The patterns are classified according to LOCATION, PATTERN, and CELL TYPE. There are eight major locations, each of which has multiple patterns and cell types. This book is aimed at trainees in Dermatology and Anatomic Pathology who are learning Dermatopathology, and also may be of value to established practitioners who only see a few skin cases, or to experienced dermatopathologists who may use the book to develop an expanded differential diagnosis, and also as a teaching aid for their own trainees.