title: JID VisualDx quiz: October 2013.
authors.affiliation: Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA.
authors.forename: Caroline Y
authors.initials: CY
authors.lastname: Winslow
authors.affiliation: Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA.
authors.forename: Robert S
authors.initials: RS
authors.lastname: Kirsner
mesh_terms: D006801:Humans; D008264:Macrophages / Q000276:immunology*; D017511:Pyoderma Gangrenosum / Q000175:diagnosis* / Q000276:immunology; D012883:Skin Ulcer / Q000175:diagnosis* / Q000276:immunology