title: [Periodic fever: the first Portuguese case-report of hyper-IgD syndrome (HIDS)].
abstract: BACKGROUND
  Periodic fever can have one of multiple causes. Among the hereditary periodic fever syndromes, hyper-IgD syndrome (HIDS) is a possible diagnosis, although, until now, no cases had been described in Portugal.
  
  
  METHODS
  We report a 25-year-old woman, with periodic fever since she was 8 months old. She had high serum IgD levels, and a molecular study of the mevalonate kinase gene was performed. A compound heterozygote was found for two mutations: V377I and T237S. This last mutation had not been observed before.
  
  
  CONCLUSIONS
  We analyse the clinical features that made us think on HIDS as a possible diagnosis, and we highlight the features that are important for the differential diagnosis between HIDS and other periodic fevers.
  
  
  CONCLUSIONS
  HIDS is a possible diagnosis for patients with periodic fever, even in Portugal.
authors.affiliation: Serviço de Medicina 2, Hospital do Espírito Santo, Evora.
authors.forename: Tiago Tribolet de
authors.initials: TT
authors.lastname: Abreu
mesh_terms: D000328:Adult; D010505:Familial Mediterranean Fever / Q000150:complications*; D005260:Female; D006801:Humans; D006942:Hypergammaglobulinemia / Q000209:etiology*; D007072:Immunoglobulin D; D011174:Portugal; D013577:Syndrome
chemical_list: D007072:Immunoglobulin D