About this study
Hemophagocytic lymphohistiocytosis (HLH) is a rare, life-threatening condition that affects the body’s immune system. The disorder most often is seen in babies and young children. This study will collect information about HLH patients’ symptoms, laboratory values, treatment, and outcomes.
Eligibility overview
- Diagnosis of a primary immunodeficiency predisposed to HLH
- Meets at least 4 of the 8 diagnostic criteria for HLH and is receiving HLH-directed therapy
- High suspicion of isolated Central Nervous System-HLH and is receiving HLH-directed therapy