Epstein-Barr virus in patients with chronic lymphocytic leukemia: a pilot study.
The objective of this study was to assess the incidence and the clinical significance of Epstein-Barr virus (EBV) in patients with chronic lymphocytic leukemia (CLL)/small lymphocytic lymphoma (SLL). Patients with CLL/SLL who presented at The University of Texas M. D. Anderson Cancer Center over a 2-year period and had available marrow paraffin blocks were studied for evidence of EBV infection using a highly specific in-situ hybridization assay for detection of EBV encoded RNA (EBERs). Results were analysed in relation to other presenting characteristics and outcome. Thirty-two patients were examined. EBERs were detected in the bone marrow of 12 of 32 (38%) CLL/SLL marrows vs 0 of 20 normal marrows (p = 0.002). EBERs were observed in sporadic granulocytes alone or in addition to its presence in lymphocytes in nine of the 12 EBV-positive patients. EBERs were detected less frequently in patients with Rai stage 0 - 1 disease (20%) compared with Rai stage 2 - 4 (66%; p = 0.008). EBER-positive patients tended to have higher lactate dehydrogenase levels (p = 0.053). The 10-year survival rate was 22% vs 58% for patients with and without discernible EBERs (log-rank, p = 0.08). Evidence of EBV infection was found in 38% of patients with CLL/SLL. Despite the small number of patients tested, discernable EBERs were significantly more common in individuals with more advanced Rai stage and there was a trend toward shorter survival in patients in whom EBV EBERs were discerned. Larger studies are needed to determine the prognostic value and role of EBV infection in patients with CLL/SLL.
Tsimberidou
Apostolia-Maria
AM
Phase I Program and Department of Leukemia, Division of Cancer Medicine, The University of Texas M.D Anderson Cancer Center, Houston, TX, USA.
Keating
Michael J
MJ
Bueso-Ramos
Carlos E
CE
Kurzrock
Razelle
R
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001856:Bone Marrow Examination; D005260:Female; D006098:Granulocytes / Q000821:virology; D004854:Herpesvirus 4, Human; D006801:Humans; D015994:Incidence; D015451:Leukemia, Lymphocytic, Chronic, B-Cell / Q000401:mortality / Q000473:pathology / Q000821:virology*; D007962:Leukocytes / Q000821:virology; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D010865:Pilot Projects; D016019:Survival Analysis