Table 2.

Underlying disease of hemophagocytic lymphohistiocytosis (n=34).

Characteristic	No. of patients (%)
Neoplastic disease (n=6; 17.6%)
Diffuse large B cell lymphoma	2 (33.3)
Hodgkin lymphoma	1 (16.7)
Hepatocelluar carcinoma	2 (33.3)
Cholangiocarcinoma	1 (16.7)
Viral infection (n=4; 11.8%)
Influenza	1 (16.7)
Cytomegalovirus	1 (16.7)
Not identified	2 (33.3)
Kikuchi’s disease (n=3; 8.8%)	3 (100)
Collagen vascular disease (n=3; 8.8%)
Systemic lupus erythematosus	1 (33.3)
Adult-onset Still disease	1 (33.3)
Granulomatosis with polyangitis	1 (33.3)
Drug (n=1; 2.9%)	1 (100)
Unknown (n=17; 50.0%)	17 (100)