Filling a gap in the literature, this reference provides concise and practical guidelines for the diagnosis and management of sinusitis and furnishes an authoritative outline of our current understanding of the pathophysiology of this condition. Addressing a wide spectrum of issues related to the identification, epidemiology, and etiology of sinusitis, this guide presents detailed illustrations and flowcharts to clarify the interactions between the pathological and physiological processes of sinusitis and illustrate current treatment practices.