The term "acute abdomen" refers to a serious, often progressive clinical situation that calls for immediate diagnostic and therapeutic action. Today, diagnosis via imaging has basically replaced the physical examination in the emergency room and the Radiologist has become of primary importance in this setting. However, close co-operation among the various specialists involved is essential for successful patient management, and thus the Radiologist needs to have a full understanding of the imaging modalities and technical skills required, as well as appropriate clinical knowledge of the disorder in order to manage the condition. This book provides a comprehensive review of the multifaceted etiology, pathophysiology and clinical presentation of acute abdominal conditions, focusing on the imaging features that are relevant to a timely management approach. Numerous high-quality images, diagrams and easy-to-read tables are provided.