Comprehensive and highly illustrated -- and now completely revised, updated, and expanded -- this important text delineates the spectrum of changes that may be present throughout the entire gastrointestinal tract. In one single, convenient source the reader will find anatomy, infectious diseases, clinical manifestations, radiology, and pathologic analysis represented through gross and microscopic photographs, line drawings, radiographs, and electron micrographs. The book is organized so that each anatomical section -- esophagus, stomach, small intestine, appendix, colon, and anus -- is divided into three chapters covering normal antomy, non-neoplastic conditions, and neoplasms involving that site. Other chapters cover Inflammatory Bowel Disease, Polyposis Syndromes, Malignant Lymphomas and Hematologic Malignancies, Mesenchymal Neoplasms, and Cytology of the Gastrointestinal Tract. New in this edition: / 30% expanded coverage, including many new illustrations / pathophysiologic concepts / more pediatric pathology / molecular biologic information / new chapters on AIDS and motility disorders.