Table 4 Clinical features of T-lymphoblastic lymphoma/leukemia according to PLZF expression

From: Expression of the promyelocytic leukemia zinc-finger in T-lymphoblastic lymphoma and leukemia has strong implications for their cellular origin and greater association with initial bone marrow involvement

 

All cases n (%)

PLZF-positive n (%)

PLZF-negative n (%)

P-value

Age (yr), median (range)

25.7 (2–59)

30.7 (8–57)

20 (2–59)

 

Age (yr), mean±s.d.

27.11±15.05

30.67±13.21

24.37±16.49

NS

Age group

   

NS

 Child (15 yr)

14 /54 (26%)

5/27 (19%)

9/27 (33%)

 

 Adult (>15 yr)

40/54 (74%)

22/27 (82%)

18/27 (67%)

 

Age >35 yr

16/54 (30%)

11/27 (41%)

5/27 (19%)

0.074

Gender

   

NS

 M

38/54 (70%)

21/27 (78%)

17/27 (63%)

 

 F

16/54 (30%)

6/27 (22%)

10/27 (37%)

 

WBC (/μl), median (range, × 1000)

6200 (1–134)

5800 (1–134)

6400 (1.6–105)

 

WBC (/μl), mean±s.d.

17 585±29 886

20 812±36 391

14 478±22 191

NS

WBC group

104/μl

14/53 (26%)

6/26 (23%)

8/27 (30%)

NS

Mediastinal involvement

 Yes

27/51 (50%)

11/23 (48%)

16/31 (52%)

NS

Bone marrow involvement

 Yes

32/47 (68%)

23/24 (96%)

9/23 (39%)

0.000

Relapse

 Yes

24/54 (44%)

13/27 (48%)

11/27 (41%)

NS

  1. Abbreviations: F, female; M, male; NS, not significant; s.d., standard deviation; yr, years.