Volume 114, Issue 6 , Pages 1456-1462, December 2004
Nuclear factor κB essential modulator–deficient child with immunodeficiency yet without anhidrotic ectodermal dysplasia
Background
Amorphic mutations in the X-linked nuclear factor κB essential modulator (NEMO) gene cause Incontinentia pigmenti, which is lethal in hemizygous male patients. Hypomorphic NEMO mutations in male patients lead to anhidrotic ectodermal dysplasia (EDA) with immunodeficiency.
Objective
To report the clinical features of a child bearing a NEMO mutation who displayed an immunodeficiency without EDA.
Methods
Documentation of clinical care, chart review, standard immunologic and microbiological laboratory techniques, mutation analysis of the NEMO gene.
Results
Since the age of 15 months, the patient had Mycobacterium avium disease, beginning with multiple adenitis, later followed by disseminated osteomyelitis and dermatitis. In addition, Haemophilus influenzae and Streptococcus pneumoniae infections led to bronchiectasis. An immunologic work-up revealed a low production of IFN-γ by PBMCs associated with a hyper-IgM phenotype. Despite treatment using repeated cycles of a 4-drug antimycobacterial regimen, continuous subcutaneous IFN-γ, repeated antibiotic treatment, and intravenous immunoglobulin substitution, the boy remained chronically ill. At the age of 12 years, the disease was complicated by severe autoimmune hemolytic anemia and eventually fatal herpes simplex virus 1 encephalitis despite high-dose acyclovir therapy. Although he did not present any sign of EDA, a novel type of disease-causing hypomorphic NEMO mutation (110-111insC in exon 2) was identified.
Conclusion
This case demonstrates that patients hemizygous for NEMO mutations can present with an immunodeficiency without EDA. An investigation of NEMO should thus be undertaken in selected children with immunodeficiency despite the lack of EDA.
Key words: Children, hyper-IgM, immunodeficiency, ectodermal dysplasia, mycobacteria
Abbreviations used: DTH, Delayed-type hypersensitivity, EDA, Ectodermal dysplasia, EDA-ID, Ectodermal dysplasia with immunodeficiency, EDAR, Receptor for ectodysplasin, HIGM, Hyper-IgM syndrome, HSV, Herpes simplex virus 1, MRI, Magnetic resonance imaging, NEMO, Nuclear factor κB essential modulator, NFκB, Nuclear factor κB, OL-EDA-ID, Ectodermal dysplasia with immunodeficiency, osteopetrosis, lymphedema, and hemangiomas, PPD, Purified protein D, RANK, Receptor activator of NFκB
PII: S0091-6749(04)02394-2
doi:10.1016/j.jaci.2004.08.047
© 2004 American Academy of Allergy, Asthma and Immunology. Published by Elsevier Inc. All rights reserved.
Volume 114, Issue 6 , Pages 1456-1462, December 2004
