Thymic stromal lymphopoietin (TSLP) is essential not only for skin allergic inflammation but also for allergen sensitization in impaired inflamed skin, and TSLP acts as a potent stimulator of type 2 helper T (Th2) cytokines, such as interleukin (IL)-4, 5, and 13, which in turn trigger IgE production [3]. Here, TSLP is linked to neoplasm.