IL31 and Hodgkins lymphoma: In the setting of lymphoproliferative disorders, involvement of IL-31 has been established in HL, of which generalized pruritus is a hallmark symptom, in follicular B cell lymphoma, which is outside the scope of our current analysis, and in CTCLs, which mostly comprise malignant CD4+ skin-homing T cells and show skewing towards Th2 [63].