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Down syndrome associated with severe combined immunodeficiency: a case report
M S Yildirim1, H Artac, I Reisli
1Department of Medical Genetics, University of Selcuk, Meram Medical Faculty, Konya, Turkey. drmselman@hotmail.com
Genetic Counseling (Geneva, Switzerland)
|October 27, 2009
Summary
This case report details an infant with Down syndrome (DS) and severe combined immunodeficiency (SCID). The patient experienced recurrent infections, highlighting a critical link between DS and immune deficiency.
Area of Science:
- Pediatric Immunology
- Clinical Genetics
- Infectious Diseases
Background:
- Down syndrome (DS) is a genetic disorder associated with immune dysregulation.
- Severe combined immunodeficiency (SCID) is a group of rare genetic disorders characterized by profound defects in T-cell and B-cell immunity.
Observation:
- An 8-month-old boy presented with recurrent bronchopneumonia and gastrointestinal infections.
- Physical examination revealed hypotonia, mental retardation, microcephaly, and distinctive facial features consistent with Down syndrome.
Findings:
- Laboratory tests confirmed Down syndrome and revealed lymphopenia, hypogammaglobulinemia, and an inverted CD4/CD8 ratio.
- A markedly reduced mitogen response of lymphocytes indicated a severe defect in immune cell function.
Implications:
- This case highlights a rare association between Down syndrome and severe combined immunodeficiency.
- Early identification and management of immune deficiencies in infants with Down syndrome are crucial for improving outcomes.
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