A Study to Evaluate the Efficacy, Safety and Pharmacokinetics of Emapalumab in Adult Patients With HLH

Hemophagocytic lymphohistiocytosis (HLH) is a rare, life-threatening condition characterized by uncontrolled hyperinflammation which may develop on the background of several clinical conditions (e.g. autoimmune disease, infection, malignancy). Emapalumab (previously referred to as NI-0501) is a monoclonal antibody neutralizing interferon-gamma (IFN-gamma), a key cytokine driving the inflammation and tissue damage seen in HLH. The purpose of this study is to assess the efficacy, safety and pharmacokinetics of emapalumab in adult patients with secondary HLH.