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HLH and MAS resources

Educational tools, support organizations, and expert information

Hemophagocytic lymphohistiocytosis (HLH) and macrophage activation syndrome (MAS) are serious hyperinflammatory conditions that may progress quickly and can be difficult to recognize. Because signs and symptoms may overlap with infection, malignancy, autoimmune disease, and other inflammatory conditions, timely education and access to reliable information are important for patients, caregivers, and healthcare professionals.

This page brings together educational materials and downloadable resources for healthcare professionals, patients, and caregivers who would like to learn more about HLH and MAS.

Downloadable resources

To quickly sort through the available resources, use the filter below.

MAS Overview Brochure

This brochure provides an overview of MAS in Still’s disease for healthcare providers, detailing the pathophysiology, key biomarkers, diagnosis, and management goals involved in the disease.

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HLH and MAS Mechanism of Disease Video
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Watch a short video explaining how IFNγ drives dangerous hyperinflammation in HLH 
and MAS.