Hemophagocytic Lymphohistiocytosis, Familial, 3, also known as familial hemophagocytic lymphohistiocytosis 3, is related to hemophagocytic lymphohistiocytosis, familial, 2 and hemophagocytic lymphohistiocytosis, familial, 1. An important gene associated with Hemophagocytic Lymphohistiocytosis, Familial, 3 is UNC13D (Unc-13 Homolog D), and among its related pathways/superpathways are Peptide hormone metabolism and Deregulation of Rab and Rab effector genes in bladder cancer. Affiliated tissues include bone marrow and bone, and related phenotypes are reduced natural killer cell activity and anemia