title: Clinical characteristics and outcomes of primary antibody deficiency: a 20-year follow-up study.
abstract: OBJECTIVE
  Primary antibody deficiency is the most common disorder among primary immunodeficiencies. Recurrent infection and chronic lung change often lead to mortality and morbidity.
  
  
  METHODS
  This study focused on the clinical presentation, molecular diagnosis, and outcomes of primary antibody deficiency in Taiwan pediatric group. Medical records of patients with primary antibody deficiency during the period 1990-2010 were retrospectively reviewed in one medical center.
  
  
  RESULTS
  Among the 34 patients evaluated, X-linked agammaglobulinemia (XLA) (29.4%) and common variable immunodeficiency diseases (CVIDs) (29.4%) were the most common disorders presented with respiratory and skin infections. Some genotype/phenotype discordance was found in one family. Patients with XLA, CVID, and hyper-IgM syndrome without complications had higher trough and initial IgG levels, and shorter delays in diagnosis. Patients with trough IgG levels >700 mg/dL had less occurrence of bronchiectasis.
  
  
  CONCLUSIONS
  These results summarized clinical manifestations of primary antibody deficiency in pediatric group in Taiwan. Clinicians should strive to shorten delays in diagnosis and maintain higher trough IgG levels to decrease subsequent mortality and morbidity.
authors.affiliation: Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan, ROC; Department of Pediatrics, Cardinal Tien Hospital, Yonghe Branch, New Taipei City, Taiwan, ROC.
authors.forename: Hung-Yi
authors.initials: HY
authors.lastname: Chan
authors.affiliation: Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan, ROC.
authors.forename: Yao-Hsu
authors.initials: YH
authors.lastname: Yang
authors.affiliation: Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan, ROC.
authors.forename: Hsin-Hui
authors.initials: HH
authors.lastname: Yu
authors.affiliation: Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan, ROC.
authors.forename: Yin-Hsiu
authors.initials: YH
authors.lastname: Chien
authors.affiliation: Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan, ROC.
authors.forename: Li-Lan
authors.initials: LL
authors.lastname: Chiang
authors.affiliation: Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan, ROC. Electronic address: gicmbor@ntu.edu.tw.
authors.forename: Bor-Luen
authors.initials: BL
authors.lastname: Chiang
mesh_terms: D000293:Adolescent; D002648:Child; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007153:Immunologic Deficiency Syndromes / Q000175:diagnosis* / Q000235:genetics / Q000628:therapy; D007223:Infant; D008297:Male
keywords: Taiwan; X-linked agammaglobulinemia; common variable immunodeficiency diseases; hyper-IgM syndrome; primary antibody deficiency