title: A 64-year-old man with chronic obstructive pulmonary disease and an atypical rash.
abstract: A 64-year-old male patient with a 15-year history of chronic obstructive pulmonary disease presented with an atypical rash that was refractory to standard therapy. Pulmonary function tests confirmed an obstructive lung disease. Basic laboratory workup revealed conflicting information, leading to a diagnostic challenge discussed in this article. Ultimately, careful testing did reveal the diagnosis and the patient was treated accordingly.
authors.affiliation: Penn State College of Medicine, Penn State University, Hershey, Pennsylvania 17033, USA. tcraig@psu.edu
authors.forename: Ethan T
authors.initials: ET
authors.lastname: Craig
authors.forename: Erin
authors.initials: E
authors.lastname: Banta
authors.forename: Timothy J
authors.initials: TJ
authors.lastname: Craig
mesh_terms: D003937:Diagnosis, Differential; D005076:Exanthema / Q000175:diagnosis* / Q000503:physiopathology; D006801:Humans; D008168:Lung / Q000473:pathology / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D029424:Pulmonary Disease, Chronic Obstructive / Q000175:diagnosis* / Q000503:physiopathology; D012129:Respiratory Function Tests; D014581:Urticaria / Q000175:diagnosis / Q000503:physiopathology; D019896:alpha 1-Antitrypsin Deficiency / Q000175:diagnosis*