Hemophagocytic lymphohistiocytosis in an adult patient with super‐refractory status epilepticus

This case report presents a 38-year-old male patient who, after a febrile infection, developed super-refractory status epilepticus and multiorgan failure, and died in 2 weeks despite the best possible intensive care. Autopsy revealed findings suggestive of hemophagocytic lymphohistiocytosis (HLH). This case shows that a rare immunological cause such as HLH may cause febrile infection-related epilepsy syndrome (FIRES), and complications of intensive care can mask the physiological and laboratory changes in HLH. PLAIN LANGUAGE SUMMARY: This case report presents a 38-year-old man who, after a febrile infection, developed intractable epileptic activity requiring intensive care treatment. During the intensive care, the patient showed signs of multiple organ damage and died in 2 weeks despite the best possible treatment. Autopsy revealed findings suggestive of hemophagocytic lymphohistiocytosis (HLH), which is a rare immune system regulation disorder leading to persistent inflammatory state and organ damages. This case shows that an immunological disorder like HLH may underlie treatment resistant fever-related epileptic seizures.