Olfactomedin-4, also known as G-CSF-stimulated clone 1 protein, Antiapoptotic protein GW112, and OLFM4, is a secreted protein which contains one olfactomedin-like domain. OLFM4 is expressed during myeloid lineage development. It is strongly expressed in the prostate, small intestine and colon and moderately expressed in the bone marrow and stomach. OLFM4 is highly expressed in pancreatic cancer tissues and shows an elevated expression level during the early S phase of the cell cycle. It is