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World Allergy Organization Journal

Open Access

Descriptive review of clinical data from 186 records of outpatients with IgA deficiency accompanied at a quaternary hospital in Brazil

  • Fabiana Mascarenhas1,
  • Myrthes Toledo Barros2,
  • Leonardo Mendonça1,
  • Cristina Kokron3,
  • Karla Boufleur1,
  • Pablo Torres1,
  • Ana Karolina Barreto De Oliveira4,
  • Octavio Grecco1,
  • Jorge Kalil3 and
  • Andrea Cohon5
World Allergy Organization Journal20158:674

Published: 8 April 2015


IgA Deficiency (IgAD) is the most common immunoglobulin deficiency, with approximate incidence of 1 in 400 to 3000 individuals in general population. Selective IgA deficiency is defined as serum IgA levels less than 7 mg/dL with normal serum IgM and IgG levels. A subgroup of individuals, with more than 7 mg/dL but less than 30 mg/dL of serum IgA, are defined as partial IgA deficient patients (pIgAD). Many individuals with selective IgA deficiency are clinically asymptomatic. However, some patients have increased incidence of infections, mainly in respiratory and intestinal tracts, as well as presence of atopy, autoimmunity and cancer.


Records review from children and adults outpatients followed at the Clinical Immunology and Allergy Division at Hospital das Clinicas of FMUSP. All patients were orally informed about the use of these clinical data. The objective was to report the clinical data observed in a cohort of IgAD patients followed between 1994 and 2014.


The most common associated condition found was atopic disease in about 60% of patients, specially rhinitis (in tIgAD and pIgAD). Prevalence of recurrent infection was 36%: 20% of sinusitis, otitis and amigdalitis, 10% of recurrent pneumonia (more than twice in the last year) and 18% of recurrent diarrhea. Autoimmunity condition was observed in 18% of the patients. Autoimmune diseases detected were thyroiditis, autoimmune hemolytic anemia, idiopathic thrombocytopenic purpura, rheumatoid arthritis, celiac-like disease, systemic lupus, Sjögren’s disease, juvenile rheumatoid arthritis, autoimmune hepatitis and vitiligo. The most prevalent disease observed was thyroid disease in about 13% of the patients. History of medication reaction was observed in 9% of them and contact dermititis in 8%. About 9% of the IgAD patients had malignancies or pre neoplastic conditions like MGUS (monoclonal gamopathy with uncertain signifcance). It was not possible to establish rate mortality among these patients because many patients lost follow up for unknown reasons, but so far, only one death was reported, and was attributed to sepsis.


Total and partial IgAD has a broad spectrum of clinical associations and further investigations to immunological intervention may have clinical results.

Authors’ Affiliations

Hcfmusp, Brazil
Hospital Das Clínicas - Faculdade De Medicina – USP, Brazil
University of São Paulo, Brazil
Laboratory of Clinical Immunology and Allergy (LIM-60), University of São Paulo Medical School, Brazil
Hospital Infantil Darcy Vargas, Brazil


© Mascarenhas et al; licensee BioMed Central Ltd. 2015

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The Creative Commons Public Domain Dedication waiver ( applies to the data made available in this article, unless otherwise stated.