Covering all aspects of gastrointestinal pathology, this award-winning volume in the Diagnostic Pathology series is an excellent point-of-care resource for pathologists at all levels of experience and training-both as a quick reference and as an efficient review to improve knowledge and skills. This updated third edition is an easy-to-use, one-stop reference for the entire GI system, offering a templated, highly formatted design; concise, bulleted text; and superior color images throughout, enabling you to arrive at the correct diagnosis and prepare actionable, useful reports. Provides comprehensive coverage with the necessary tools to make a comprehensive diagnostic workup Incorporates significant changes in the AJCC cancer staging of gastrointestinal tumors Provides details on PD-L1 (immune checkpoint inhibitor) therapy, new types of colitis, and molecular biology of GI tract tumors as it relates to precision medicine and targeted therapy Discusses timely topics such as GAPP, a newly described form of gastric polyposis that leads to cancer; the increasing complexity of large B-cell lymphomas and which immunostains and molecular tests to order for proper classification and therapy; Immune Modulator therapy effect, which can closely mimic IBD; and newly described polyposis syndromes, such as mixed and serrated polyposis Features more than 2,500 annotated images throughout, including gross pathology, a wide range of stains, and detailed medical illustrations, depicting virtually any GI specimen you're likely to see 2015 BMA Medical Book Awards 1st Prize Award Winner in Pathology Category (previous edition) Enhanced eBook version included with purchase, which allows you to access all of the text, figures, and references from the book on a variety of devices