Book excerpt: ? Over 1,350 illustrations in 350 innovative composite figures designed to teach general pathologists the cytologic approach and cytologists the histologic basis for cytologic criteria? CD-ROM containing high resolution composite images that can be enlarged to the size of computer screen and detailed legends with clinical presentation, cytologic clues with different stains from low to high magnification as well as the mistakes made and lessons learned? Pathologic entities are arranged in the current classifications used by surgical pathologists so that they can translate their experience in histopathology to cytopathology? New classifications of tumors based on advances in cytogenetic and molecular evidence and all new illustrated cases from G C H Yang's collection? A new chapter on gynecologic tumors has been added. The chapter on malignant lymphoma has been completely rewritten to incorporate current WHO classifications. New tumors discovered in the past 16 years and new classifications of adrenal, kidney, liver and pancreatic tumors have been addedThe objective of this book is to share authors' combined 30 years' experience in the fine-needle aspiration biopsy diagnosis of organs beneath the diaphragm with general pathologists. Starting from the basics, this book progresses to in-depth cytomorphologic analysis with histologic and immunohistochemical confirmation of specific entities. Cytohistological correlation is emphasized by using composite images from either resected tumor or the cell block whenever possible. In addition, ultrastructural basis of cytological features is emphasized. Both cytology and electron microscopy classify tumors by meticulously analyzing the cytoplasmic features and cell junctions of scanty sample. Every histopathology entity should have a counterpart in cytopathology, since both derive from the same entity undergoing the same pathological process. The difference is in the artifacts; thus an attempt was made to explain the artifacts of aspiration cytology so that histopathologists may understand the cytologic approach and learn to interpret aspiration cytology with confidence.