Hairy cell leukemia in father and son

Area of Science:

• Hematology
• Oncology
• Genetics

Background:

• Hairy cell leukemia (HCL) is a rare B-cell chronic lymphoid leukemia.
• While typically sporadic, understanding potential genetic predispositions is crucial for HCL research.

Observation:

• A father and son presented with HCL, confirmed by tartrate-resistant acid-phosphatase-positive cells and bone marrow biopsies.
• Interviews excluded consanguinity, primary immune deficiency, and shared medication use as contributing factors.

Findings:

• Human Leukocyte Antigen (HLA) typing revealed both patients share identical HLA-A and HLA-B alleles (A1,3 and B8,14).
• This shared HLA profile in unrelated HCL patients warrants further investigation into genetic associations.

Implications:

• The findings suggest a potential, previously unrecognized genetic susceptibility to HCL.
• Further research into HLA linkage and HCL pathogenesis may reveal novel diagnostic or therapeutic targets.