title: Chronic urticaria: an unusual initial manifestation of primary hyperparathyroidism.
abstract: OBJECTIVE
  To discuss the rare association between primary hyperparathyroidism and chronic urticaria.
  
  
  METHODS
  A case report with clinical and laboratory details is presented, and the pertinent literature is reviewed.
  
  
  RESULTS
  A 29-year-old patient with chronic urticaria for more than 2 years, which was partially responsive to medical treatment, was found to have primary hyperparathyroidism. After parathyroidectomy, the urticaria resolved, and it has not recurred during a 1-year follow-up period.
  
  
  CONCLUSIONS
  Primary hyperparathyroidism can be a rare cause of chronic urticaria.
authors.affiliation: Division of Internal Medicine, University of Medicine and Dentistry of New Jersey, Camden, New Jersey, USA.
authors.forename: Hikmat N
authors.initials: HN
authors.lastname: Dagher
authors.forename: Ziad C
authors.initials: ZC
authors.lastname: Aboujaoude
authors.forename: Serge A
authors.initials: SA
authors.lastname: Jabbour
mesh_terms: D000328:Adult; D002118:Calcium / Q000097:blood; D002908:Chronic Disease; D006801:Humans; D006961:Hyperparathyroidism / Q000150:complications / Q000175:diagnosis* / Q000601:surgery; D008297:Male; D016105:Parathyroidectomy; D010758:Phosphorus / Q000097:blood; D012709:Serum Albumin / Q000032:analysis; D014581:Urticaria / Q000209:etiology*
chemical_list: D012709:Serum Albumin; D010758:Phosphorus; D002118:Calcium