LILRA6 (leukocyte immunoglobulin-like receptor A6) is an activating immune receptor that pairs with the inhibitory receptor LILRB3, both sharing identical extracellular domains but differing in signaling capabilities 1. LILRA6 mediates activating signals through association with the FcRγ adaptor molecule, which contains immunoreceptor tyrosine-based activation motifs 1. The receptor is primarily expressed on monocytes and neutrophils, where it modulates immune responses 12. LILRA6 recognizes cytokeratin 8-associated ligands exposed on necrotic glandular epithelial cells, with binding specificity varying among allelic variants 3. This interaction may influence immune responses within tumor microenvironments where necrosis is common 3. Unlike most LILR genes, LILRA6 exhibits copy number variation, with 32% of Caucasians carrying more than two copies and 4% having only one copy per diploid genome 1. Expression levels correlate with gene copy number, potentially affecting receptor surface density and signaling strength 1. The gene is highly polymorphic and subject to non-allelic homologous recombination with LILRB3, contributing to genetic diversity 4. LILRA6 activates multiple signaling pathways including JAK-STAT, NF-κB, and MAPK, inducing cytokine production and enhancing immune responses 5.