TNFSF10 and neoplasm: A variety of immune cells, including eosinophil granulocytes [7], macrophages [8,9], neutrophil granulocytes [10,11], dendritic cells [12,13], monocytes [9,14], natural killer (NK) cells [15], T and B cells [16,17], express TRAIL, and it is well established that TRAIL plays an important role in tumor immune surveillance, making TRAIL a promising candidate for an anticancer therapeutic [18,19,20].