Study to Assess the Efficacy and Safety of Emapalumab in Primary Haemophagocytic Lymphohistiocytosis
The purpose of this study is to expand the knowledge on the efficacy and safety of emapalumab (previously known as NI-0501) as a treatment for primary haemophagocytic lymphohistiocytosis (HLH) patients, including on long-term outcomes and quality of life assessments. Emapalumab can be administered as the first-line therapy to patients not previously treated with the current standard of care, or can be given to patients who have either failed or were unable to tolerate the available standard of care. Emapalumab is to be administered until the start of conditioning for hematopoietic stem cell transplantation (HSCT), with an anticipated duration ranging from a minimum of 4 weeks to approximately 12 weeks and not exceeding 6 months. After treatment completion, patients will continue in the study for long-term follow-up until 1 year after either HSCT or last emapalumab infusion (if HSCT is not performed).