Hemophagocytic Lymphohistiocytosis, Familial, 4, also known as familial hemophagocytic lymphohistiocytosis 4, is related to hemophagocytic lymphohistiocytosis, familial, 1 and hemophagocytic lymphohistiocytosis, familial, 2, and has symptoms including fever An important gene associated with Hemophagocytic Lymphohistiocytosis, Familial, 4 is STX11 (Syntaxin 11), and among its related pathways/superpathways are wtCFTR and delta508-CFTR traffic / Generic schema (norm and CF) and Nicotine Pathway (Dopaminergic Neuron), Pharmacodynamics. Affiliated tissues include bone marrow and bone, and related phenotypes are splenomegaly and hepatomegaly