LTA4H is an epoxide hydrolase that catalyzes the final step in biosynthesis of the proinflammatory leukotriene B4 which is a strong chemotactic factor for mast cells and neutrophils and has been implicated in the pathogenesis of several chronic inflammatory diseases and of cancer through increasing transcription of oncogenes and interfering with apoptosis [21]. Here, LTA4H is linked to cancer.