“…The history of the management of MAS associated with autoimmune diseases, together with associated HLH syndromes such as those that may accompany malignancy, primary immunodeficiency, and infection, highlight the critical role of the clinical immunologist at the juncture of the traditional specialties of hematology/oncology, allergy/immunology, infectious disease, rheumatology, and the subdivisions of adult and pediatric medicine thereof [82]. The modern management of MAS and other HLH syndromes has made great strides as a result of therapeutic advances over the last 20 years, similar to promising approaches to therapies [83] and etiology [84] in other clinical settings, but the promise of even greater strides looms as the benefits of standardized nomenclature, systematic investigation, and collaborative medicine take root in the soil of team-based science.…”