Hemophagocytic lymphohistiocytosis in adults.

Hemophagocytic lymphohistiocytosis (HLH), a rare but life-threatening condition characterized by uncontrolled inflammation, is increasingly recognized in adults. The management of adult onset HLH is challenging, in part due to gaps in current state of knowledge on etiology, clinical presentation, diagnosis, and management. HLH secondary to triggers such as infections, autoimmune disorders, and malignancy are more commonly seen in adults although cases of familial form have also been reported. Underlying conditions such as sepsis, or malignancy could pose as major confounders while applying universal diagnostic criteria, and therefore could lead to delay in diagnosis. Despite advent of newer therapeutic agents, outcomes of adults continue to remain poor. Future efforts need to be orchestrated to develop evidence-based tailored therapies to improve outcomes of this under recognized heterogeneous entity.