This volume comprehensively describes the anatomy, pathophysiology, diagnostics, and modalities of treatment of one of the most complex and debated clinical conditions in coloproctology: anal fistulas and abscesses. It also debates current controversies and presents the best approaches based on the authors' clinical expertise. Providing an in-depth understanding of the anal canal anatomy and surrounding area, it enables readers to manage anal sepsis and avoid excessive damage, in particular to the anal sphincters. Further, the book presents insights into the pathophysiological processes (in cryptoglandular and Crohn's disease) causing abscess and fistula, which have a significant impact on the management of these conditions. It also discusses diagnostic assessments crucial for selecting the optimal surgical technique and offers guidance on the timing. Lastly, it assesses the pros and contras of the various surgical procedures, evaluating the possible outcome in terms of both therapeutic success and detrimental effects on the anorectal functions. As such it is a valuable resource for all physicians involved in the management of anal fistulas and abscesses (coloproctologists, general surgeons, gastroenterologists, radiologists).