How i treat primary haemophagocytic lymphohistiocytosis.

Primary haemophagocytic lymphohistiocytosis (HLH) diseases are a collection of inherited genetic disorders that cause the syndrome of HLH. Great advances have been made in the last 20 years with regard to the discovery of many of the genetic aetiologies of disease. Several advances have also been made on the clinical stage. Accurate screening diagnostics for primary HLH diseases that are superior to traditional Natural Killer cell function testing have been developed and are now available in many countries. There is now grounded clinical experience on which to base routine treatment decisions for patients with HLH. Newer approaches to allogeneic haematopoietic cell transplantation have increased overall patient survival. Despite these advances, however, there is still much work to be done to further improve patient care. This 'How I Treat' article will focus on summarizing current diagnostic, treatment and transplant strategies for patients with primary HLH diseases.