Clinical characteristics and outcomes of primary antibody deficiency: A 20-year follow-up study

Background/PurposePrimary antibody deficiency is the most common disorder among primary immunodeficiencies. Recurrent infection and chronic lung change often lead to mortality and morbidity.MethodsThis 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.ResultsAmong 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.ConclusionThese 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.