IL4 and B-cell non-Hodgkin lymphoma: Few studies indicate that increased abundance of Th2 cells can be considered to predict poor survival in colorectal and esophageal cancer [9, 10], while others suggest that high proportions of Th2 cells and expression of IL4, which is secreted by Th2 cells, may help predict a good prognosis in B cell non-Hodgkin’s lymphoma (NHL) [11].