Cervical lymphadenopathy due to Kikuchi disease: US and CT appearance

A patient with Kikuchi disease (histiocytic necrotizing lymphadenitis), who came to clinical attention because of cervical lymphadenopathy, is presented. CT and ultrasonographic findings of this disease are described. The importance of this entity lies in the fact that it can be easily confused clinically, pathologically, and radiologically with malignant lymphadenopathy, especially lymphoma.