Features:

• Reactive germinal centers - poorly demarcated (due to loose epithelioid cell clusters at germinal center edge).
• Epitheliod cells - loose aggregates of histiocytes (do not form round granulomas).
• Monocytoid cells - B cells (that look like monocytes) in tight cell clusters of cells often with interspersed neutrophils.

• 
  Very low mag.
• 
  Low mag.
• 
  High mag.
• 
  Very high mag.
• 
  High mag.
• 
  Very high mag.