Table II. Clinical Characteristics of 86 Children with ALCL.

Characteristic	Number (%) (n=86)
Gender
Male	48 (56%)
Female	38 (44%)
Age (years)
< 5	6 (7%)
5 to 9	29 (34%)
10 to 14	33 (38%)
≥ 15	18 (21%)
Mediastinal Mass (N=85)	30 (35%)
Extranodal Involvement (N=84)
Skin	13 (15%)
Liver	5 (6%)
Lung	12 (14%)
Bone	10 (12%)
Other viscera	14 (17%)
Bone Marrow	11 (13%)
CNS	1 (1%)
Immunophenotype (n=77)
T lineage	64 (83%)
Null lineage	13 (17%)
ALK Status (n=71)
Positive	64 (90%)
Negative	7 (10%)
Initial LDH (n=85)
Normal	74 (86%)
> 2 × normal	12 (14%)