1.概念 Lymphomas- Definition Clonal tumors of mature and immature lymphocyte including B-cells, T-cells and Natural Killer(nk)cells and so on Malignant tumors of immune system Involved organs and tissues Lymphoid organsand tissues Extranodal tissues Bone marrow Peripheral blood1. 概念 Lymphomas- Definition • Clonal tumors of mature and immature lymphocyte including B-cells, T-cells and Natural Killer (NK) cells and so on. • Malignant tumors of immune system. • Involved organs and tissues: - Lymphoid organsand tissues - Extranodal tissues - Bone marrow - Peripheral blood