This book has been designed to serve as a quick reference that will assist in decision making. The book is ordered alphabetically according to diagnoses. The intention is that the clinician consults the information on a suspected diagnosis, and then considers the listed surgical and radiological differential diagnoses. A total of 80 common diagnoses are covered. For each diagnosis, the left-hand page presents information relevant to the surgeon, while the right-hand page is designed for the radiologist. The information for the surgeon comprises clinical insights, including symptoms, warnings, controversies, other important facts, and the surgical differential diagnosis. The radiologist is provided with lists of the primary and follow-on investigations, the imaging findings, and helpful tips, as well as the radiological differential diagnosis. Informative supporting images are included for each diagnosis. The authors are all experts in their fields, with extensive practical experience.