Kikuchi-Fujimoto disease as a rare cause of fever of unknown origin in a septuagenarian.

We report the case of a 72-year patient presented with fever of unknown origin. Initial clinical and radiological findings suggested a diagnosis of lymphoma. However, subsequent histology revealed Kikuchi-Fujimoto disease (KFD). KFD is predominantly a self-limiting disease of the young, but should be considered in the differential diagnosis of older patients presenting with fever of unknown origin or features suggestive of lymphoma.