title: Fine-needle aspiration diagnosis of thyroid blastomycosis.
abstract: OBJECTIVE
  To describe an elusive case of blastomycosis involving the thyroid gland, which was ultimately diagnosed by use of ultrasound-guided fine-needle aspiration (FNA).
  
  
  METHODS
  We present a case report, including clinical features, results of laboratory studies, and radiographic, computed tomographic, and ultrasonographic findings. In addition, the treatment and the utility of FNA of the thyroid relative to the diagnosis of blastomycosis are discussed.
  
  
  RESULTS
  An 18-year-old woman with no significant past medical history and with a competent immune system presented initially to her family physician because of headaches, lymphadenopathy, blurry vision, and fatigue. Radiography of the chest showed findings considered consistent with pneumonia, for which amoxicillin was prescribed. Subsequently, an ophthalmologist diagnosed anterior uveitis and initiated topical corticosteroid therapy. Worsening symptoms prompted performance of computed tomography of the chest, which suggested thyroid involvement. Ultimately, FNA of a thyroid nodule led to the cytologic diagnosis of blastomycosis. The patient was treated successfully with amphotericin for blastomycosis of the eye, lung, and thyroid.
  
  
  CONCLUSIONS
  Physicians should consider the potential presence of blastomycosis when a lung lesion does not improve with typical treatment interventions. Disseminated blastomycosis can be diagnosed with use of FNA of the thyroid.
authors.affiliation: University of Arkansas School of Medicine, Little Rock, Arkansas 72205, USA.
authors.forename: Andre
authors.initials: A
authors.lastname: Wineland
authors.forename: Eric
authors.initials: E
authors.lastname: Siegel
authors.forename: Carrie
authors.initials: C
authors.lastname: Francis
authors.forename: Chien
authors.initials: C
authors.lastname: Chen
authors.forename: Donald
authors.initials: D
authors.lastname: Bodenner
authors.forename: Brendan C
authors.initials: BC
authors.lastname: Stack
mesh_terms: D000293:Adolescent; D044963:Biopsy, Fine-Needle / Q000379:methods*; D001759:Blastomycosis / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005123:Eye / Q000382:microbiology / Q000473:pathology; D005260:Female; D006801:Humans; D008168:Lung / Q000382:microbiology / Q000473:pathology; D013959:Thyroid Diseases / Q000382:microbiology / Q000473:pathology*; D013961:Thyroid Gland / Q000382:microbiology / Q000473:pathology*