RESUMO
Objective Hemapoietic stem cell (HSC) is a kind of pluripotent cell which can differentiate into different kinds of cells,including blood cells and immune cells.Hemapoietic stem cell transplantation(HSCT) is to destory abnormal bone marrow hematopoietic cells,and imbed healthy stem cells to reconstruct hematopoiesis and immune system,and it is an effective therapy for the treatment of hematopoietic malignances,genetic and metabolic disease,autoimmune disease and solid tumor.At present,it has been widely used to treat the patients with hematologial malignant tumors,such as lymphoma and leukemia.Clinical investigation showed that patients with leukemia and psoriasis after HSCT,both leukemia and psoriasis were cured.In this review,the immunopathogenesis of psoriasis,the possible mechanism of psoriasis associated with leukemia,the immunopathogenesis of HSCT and the theory basis of treating psoriasis and the application of HSCT in the treatment of psoriasis with leukemia were comprehensively discussed.