Kikuchi--Fujimoto disease: a rare presentation of a groin lump.

Lumps in the groin frequently present to the accident and emergency department and can relate to a number of diseases that require different management. Kikuchi's disease, first described in Japan in 1972 is a form of histiocytic necrotising lymphadenitis. It was discovered as a result of patients who were previously diagnosed with lymphoma but then recovered too quickly for it to be lymphoma. There appears to be no association with other pathologies but it remains important to exclude any autoimmune diseases and other causes of lymphadenopathy. We present a single rare case of a 39-year-old Caucasian gentleman who presented with a tender right inguinal groin lump.