Autoimmune lymphoproliferative syndrome; a case report.

Area of Science:

• Immunology
• Hematology
• Genetics

Background:

• Autoimmune lymphoproliferative syndrome (ALPS) is a rare disorder affecting lymphoid system regulation.
• It is characterized by chronic splenomegaly, lymphadenopathy, autoimmune phenomena, and immune-mediated cytopenias.
• A key diagnostic feature is an increased population of double-negative T cells (CD3+CD4-CD8-).

Purpose of the Study:

• To report a case of ALPS in a 16-year-old boy.
• To highlight the diagnostic approach and clinical presentation of ALPS.
• To emphasize the importance of considering ALPS in the differential diagnosis of unexplained cytopenias and lymphoproliferative disorders.

Main Methods:

• Clinical case presentation of a 16-year-old male.
• Flow cytometry of peripheral blood to identify T lymphocyte subsets.
• Immunophenotyping of lymph node tissues.
• Review of diagnostic criteria for ALPS.

Main Results:

• The patient presented with petechiae, purpura, epistaxis, fever, and recurrent cytopenias.
• Physical examination revealed lymphadenopathy and splenomegaly.
• Flow cytometry and immunophenotyping confirmed an increased number of CD3+CD4-CD8- T lymphocytes, suggesting ALPS.
• ALPS was diagnosed in the patient.

Conclusions:

• ALPS should be considered in patients with unexplained Coomb's positive cytopenias, hypergammaglobulinemia, lymphadenopathy, and splenomegaly.
• Diagnostic confirmation relies on genetic analysis of genes in the Fas pathway.
• Early diagnosis and genetic testing are crucial for managing ALPS.