Table 2.
Relative and Absolute Counts of PB Lymphocytes, LGL, and Expanded Vβ-Families in Patients with Persistent Expansions of CD4+ and CD8+bright LGL According to the Presence or Not of a Monoclonal Expansion of PB T Cells by Molecular Techniques
Expansions of CD8+bright LGL | Expansions of CD4+ LGL | |||||
---|---|---|---|---|---|---|
Polyclonal/oligoclonal n = 34 | Monoclonal n = 38 | P value | Polyclonal/oligoclonal n = 6 | Monoclonal n = 20 | P value | |
Number of PB lymphocytes× 109/L | 3.1± 2.3 (2.4) (1.0–13.4) | 5.9± 3.6 (5.0) (1.1–18.3) | .0001 | 3.2 ± 2.6 (2.7) (0.9–8.3) | 7.1± 4.2 (6.5) (1.4–17.3) | .028 |
Number of total PB CD8+bright or CD4+ T cells× 106/L | 1398± 1446 (842) (363–8080) | 4178± 3520 (3312) (572–17755) | .0001 | 1791± 1420 (1551) (492–4467) | 5063± 3161 (4633) (491–11479) | .025 |
Number of total PB CD8+bright or CD4+ LGL× 106/L | 1070± 1288 (607) (225–7111) | 3892± 3517 (3146) (481–17577) | .0001 | 678± 446 (618) (280–1519) | 4455± 3049 (4309) (123–11020) | .003 |
Percentage of total PB CD8+bright or CD4+ LGL | 68± 15 (67) (31–97) | 90 ± 8 (92) (73–99) | .0001 | 46± 22 (38) (20–76) | 81± 18 (88) (25–96) | .001 |
Number of cases with expansions of one or more TCR-Vβ families (%) | 31/34 (91%) | 37/38 (97%) | N.S. | 6/6 (100%) | 20/20 (100%) | N.S. |
Number of cases showing expansions of more than one TCR-Vβ families (%) | 18/34 (53%) | 3/38 (8%) | .001 | 1/6 (17%) | 1/20 (5%) | N.S. |
Number of cases with at least one Vβ expansion > 40% | 5/34 (15%) | 36/38 (95%) | .0001 | 3/6 (50%) | 18/20 (90%) | .006 |
Highest Vβ expansion | 22± 12 (21) (4–47) | 74± 17 (79) (27–96) | .0001 | 34± 19 (32) (13–58) | 75± 22 (83) (24–96) | .001 |
Ratio between the highest Vβ expansion and the % of LGL within CD8+bright or CD4+ T-cells | 0.35± 0.18 (0.33) (0.07–0.66) | 0.82± 0.16 (0.87) (0.31–1.00) | .0001 | 0.75± 0.21 (0.78) (0.38–0.99) | 0.91± 0.14 (0.97) (0.41–1.00) | .028 |
Results are presented as mean ± standard deviation, median (in brackets), and range (italic, in brackets). N.S.: no significant differences.