Kikuchi-Fujimoto Disease or Lymphoma?

Kikuchi-Fujimoto disease is a rare, idiopathic and usually self-limiting disease caused by lymphadenitis. The main symptoms are lymphadenopathy and fever, and less frequent symptoms are night sweats, arthralgia, weight loss and rashes. A case of a 16 years old boy is presented. His complaints were cervical mass presenting for about three weeks, night sweats, weight loss and fatigue. Our aim is that in the differential diagnosis of fever and lymphadenopathy of unknown origin, diseases such as lymphoma and tuberculosis, as well as rare and mostly very benign Kikuchi-Fujimoto disease should be remembered.