This gene encodes an immunoglobulin-like cell surface protein that is expressed predominantly on plasmacytoid dendritic cells (PDCs) and modulates the function of these cells in the immune response. Expression of this gene is downregulated by interleukin 3 (IL3). This gene is one of a cluster of highly related genes located at chromosomal region 19q13.4. LILRA4 (Leukocyte Immunoglobulin Like Receptor A4) is a Protein Coding gene. Diseases associated with LILRA4 include Blastic Plasmacytoid Dendritic Cell. Among its related pathways are Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell and Innate Immune System. An important paralog of this gene is LILRB3.