Hemophagocytic lymphohistiocytosis due to infections, autoimmune disorders, or underlying malignancies. Signs and symptoms include fever, lymphadenopathy, hepatomegaly, splenomegaly, and pancytopenia. The disease is MONDO_0015542 (secondary hemophagocytic lymphohistiocytosis). Also known as: acquired hemophagocytic lymphohistiocytosis, acquired hemophagocytic syndrome, reactive hemophagocytic syndrome.