title: All that is red is not cellulitis. Pyoderma gangrenosum.
abstract: A 60-year-old patient presented with progressive worsening, non-healing ulcer on her shin with surrounding erythema following a minor trauma and was treated with several antibiotics for presumed cellulitis with no improvement. A skin biopsy eventually suggested pyoderma gangrenosum and a colonic biopsy showed an underlying ulcerative colitis.
authors.affiliation: Mayo Clinic, Rochester, MN, United States. Electronic address: sharma.prashant@mayo.edu.
authors.forename: Prashant
authors.initials: P
authors.lastname: Sharma
authors.affiliation: Temple University, Philadelphia, PA, United States.
authors.forename: Sourab
authors.initials: S
authors.lastname: Dhungel
mesh_terms: D002481:Cellulitis / Q000175:diagnosis*; D003093:Colitis, Ulcerative / Q000150:complications / Q000175:diagnosis*; D003937:Diagnosis, Differential; D003951:Diagnostic Errors; D005260:Female; D006801:Humans; D007866:Leg; D008875:Middle Aged; D017511:Pyoderma Gangrenosum / Q000150:complications / Q000175:diagnosis* / Q000473:pathology; D012867:Skin / Q000473:pathology
keywords: Inflammatory bowel disease; Pyoderma gangrenosum; Skin rash