[Investigation of large granular lymphocytic leukemias: data from the laboratory of hematology at Nancy University Hospital, France].

UNLABELLED: Large granular lymphocytic leukemia (LGLL) is a rare clonal lymphoproliferative disorder from T or NK origin.

PURPOSE: to report on the diagnostic and therapeutic management of LGLL investigated in the university hospital at Nancy, France.

METHODS

retrospective (7 years) collection of clinical and biological data and patients' cohort analysis.

RESULTS

Eight out of fifteen patients presented with neutropenia, including five profound neutropenia (neutrophils < 500 × 109/L). Four patients had an infection. Two patients have rheumatoid arthritis and an associated Felty's syndrome, one a Sweet syndrome. Two also suffered from chronic Lymphocytic Leukemia, and one from a diffuse large B-cell lymphoma. Twelve patients had LGLL-T and 3 had a chronic LGLL-NK. Eleven out of twelve patients had a clonal LGLL-T when polymerase chain reaction assessed. No KIR clonality was sought among the 3 LGL-NK patients. Five patients out of fifteen received immunosuppressive treatment.

CONCLUSION

Although using simple and robust investigations, our series demonstrates a high heterogeneity in LGLL detection and assessment.