Reactive proliferations of white cells and lymph nodes refer to events occurring in the white cells and lymph nodes in response to infection and inflammation resulting to an increase in it’s numbers.

Examples of reactive proliferations of white cells and lymph nodes include: 

• Leukocytosis
• Lymphadenitis 
• Acute nonspecific lymphadenitis
• Chronic nonspecific lymphadenitis
• Hemophagocytic lymphohistiocytosis