We report a patient with immune dysregulation, polyendocrinopathy, enteropathy, X-linked (IPEX) syndrome with a novel splicing mutation of the FOXP3 gene. The patient is a boy, born at 39 + 2 weeks gestation with a birth weight of 3,280 g. The family history was unremarkable. He was well until 11 months of age, when he was diagnosed with type 1 diabetes mellitus. The level of urine C-peptide was 0.58 μg/day (normal range, 44–116 μg/day). Glutamic acid decarboxylase autoantibody was not detected, but a high level of anti-insulin antibody (50 IU/mL; normal range, <5 IU/mL) was noted. This patient presented with unusual clinical features, including pure red cell aplasia, membranous glomerulopathy, and posterior reversible encephalopathy syndrome after a vaccination against influenza A H1N1 virus. The diagnosis of IPEX was made when the patient was 11 years old, which is quite late compared with typical cases. Conclusion: Although IPEX syndrome is usually a disease of infancy, it should not be ruled out solely on the basis of age. IPEX presentation is so variable that it should be suspected in a male child with one or more autoimmune disorders and severe infections.
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A novel mutation and unusual clinical features in a patient with immune dysregulation, polyendocrinopathy, enteropathy, X-linked (IPEX) syndrome
Keun, Bae; Bo, Kim; Jin-Ho, Choi; Joo, Lee; Young, Park; Gu-Hwan, Kim; Han, Yoo; Jong, Seo
Follow European Journal of Pediatrics
, Volume 170 (12)
Springer Journals – Dec 1, 2011
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