Introduction: Kikuchi-Fujimoto disease is a rare, benign necrotizing lymphadenitis primarily affecting young women. Case presentation: We present the case of a 26-year-old female patient with no notable medical history, who developed a persistent right-sided lateral cervical lymphadenopathy over a two-month period. Following a comprehensive clinical, laboratory, radiological, and histopathological evaluation, a diagnosis of Kikuchi-Fujimoto disease was confirmed. Given the rarity of this condition, clinicians should maintain a high index of suspicion to avoid misdiagnosis or delayed recognition. Clinical discussion: Kikuchi-Fujimoto disease is a rare, It presents as febrile cervical lymphadenopathy and may be associated with systemic lupus erythematosus. Often mistaken for conditions such as non-Hodgkin lymphoma, its diagnosis relies on histopathological examination. Lymph node biopsy is crucial to prevent unnecessary investigations. The prognosis is generally favorable, with treatment commonly involving corticosteroids. Conclusion: While the prognosis for KFD is generally favorable, around 30% of sufferers may go on to develop systemic lupus erythematosus, underlining the need for ongoing monitoring of autoimmune markers
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