IL6 and medullary thyroid gland carcinoma: Studies have shown that high peak levels of hs-CRP as an acute phase protein were associated with the occurrence of major transplant-related complications (MTC).20 In several studies, the adverse relationship between the IL-6 levels and survival and also complications after transplantation such as aGVHD was observed.21-23 Also, low capacity of IL-10 production by blood mononuclear cells may contribute to mechanisms involved in the event of MTC.24