IL5 and urinary bladder cancer: The presence of eosinophils in different amounts within the stroma of 66 bladder cancers (42.3%) is obviously due to the action of potent eosinophil chemoattractants, such as eotaxin, platelet activating factor, C5a, interleukin-5, and immunoglobulin E (IgE) [12-13,18].