Chronic Lymphocytic Leukemia with Aberrant CD8 Expression and Atypical Morphology: A Case Report and Review

Abstract

Chronic lymphocytic leukemia (CLL) is a mature B-cell neoplasm with characteristic immunophenotype. This report presents a rare case of CLL with co-expression of T-cell marker CD8. The molecular analysis confirmed clonal immunoglobulin genes and no clonal rearrangement for T-cell receptor β and γ genes. The cell morphology was atypical of CLL, with features resembling reactive T lymphocytes. The phenotypic and morphologic findings may represent a CLL variant.