Pulmonary hemorrhage in a case of CD25 deficiency
Introduction: Presentation with severe autoimmune manifestations in early infancy is rare, especially when the gut is not involved. Methods: Lymphocyte phenotyping, determination of autoantibodies, and Sanger sequencing were employed to investigate this case. Results: A novel homozygous mutation in CD25 was identified in the patient who presented in the first weeks of life with insulin-dependent diabetes mellitus (IDDM) and subsequently developed autoimmune cytopenia and pulmonary hemorrhage. Conclusion: CD25 deficiency is present in the Gulf (Oman) and cases with early autoimmune manifestations should be tested for this possibility. Statement of novelty: A novel mutation in CD25 leads to an early presentation of IDDM and pulmonary hemorrhage.