In this issue of Dermatologic Clinics, guest editor Dr. Stan N. Tolkachjov brings his considerable expertise to the topic of Neutrophilic Dermatoses. Top experts in the field cover topics such as pyoderma gangrenosum: diagnostic criteria, subtypes, systemic associations, and workup ; Sweet syndrome and neutrophilic dermatosis of the dorsal hands; neutrophilic urticarial dermatoses, including Schnitzler syndrome; hidradenitis suppurativa and its relationship to neutrophilic dermatoses; and much more.