Multiple myeloma is a hematological cancer which is characterized by malign proliferation of plasma cells and their precursors. Although myeloma cells express antigens which can be recognized by host T cells they can be rarely eradicated by the immune system because of the immunsupression by tumor microenvironment. The immunsuppressive regulatory T cells (Treg) with CD4+ CD25+ Foxp3+ fenotype are increased in peripheral blood of multiple myeloma patients which have key roles on oto-immune control, T-cell homeostasis, immunmodulation of all the immune response. This book is a combination of...