Dr Teruo Matsumoto, chairman of surgery, and 11 of his colleagues at the Hahnemann Medical College, collaborated on this monograph that is aimed at providing "practical yet adequate basic knowledge for the first line practicing physicians on how to handle massive GI hemorrhage." Chapters on pathophysiology and pathology are followed by chapters on the diagnostic techniques of endoscopy, arteriography, and roentgenography. The lesions that cause gastrointestinal (GI) hemorrhage are discussed in chapters on peptic ulcer disease, varices, and gastric mucosal hemorrhage and all other sources. Finally, there is a chapter on lower GI bleeding. Granted, there is a real need for a concise monograph to update the management of acute GI hemorrhage. As Dinoso points out in the first chapter, advances have been made in the following three areas: diagnosis, eg, fiberoptic endoscopy and selective angiography; pathophysiology, new information on acute mucosal lesions; and treatment, selective infusion of vasoconstrictors. The