Any of a group of malignant tumors of lymphoid tissue that differ from HODGKIN DISEASE, being more heterogeneous with respect to malignant cell lineage, clinical course, prognosis, and therapy. The only common feature among these tumors is the absence of giant REED-STERNBERG CELLS, a characteristic of Hodgkin's disease.

Synonyms: Pleomorphic Lymphomas, Lymphoma, Diffuse Undifferentiated, Small Non-Cleaved-Cell Lymphomas, Lymphoma, Non Hodgkin's, Lymphoma, Mixed-Cell, Diffuse, High-Grade Lymphomas, Nonhodgkin's Lymphoma, Pleomorphic Lymphoma, Diffuse Lymphomas, Lymphoma, Pleomorphic, Small Cleaved-Cell Lymphoma, Diffuse, Reticulosarcoma, Diffuse Mixed Small and Large Cell Lymphoma, Lymphatic Sarcomas, Non-Hodgkin Lymphoma, Lymphoma, Mixed Cell, Undifferentiated Lymphomas, Mixed Lymphomas, Diffuse Mixed-Cell Lymphomas, Mixed-Cell Lymphoma, Lymphoma, Small Cleaved Cell, Diffuse, Lymphoma, Mixed Small and Large Cell, Diffuse, Diffuse Mixed-Cell Lymphoma, Non Hodgkin's Lymphoma, Lymphoma, Low Grade, Mixed-Cell Lymphomas, Lymphoma, Mixed Lymphocytic-Histiocytic, Reticulum Cell Sarcoma, Undifferentiated Lymphoma, Lymphoma, Nonhodgkin, Mixed Cell Lymphoma, Lymphoma, Undifferentiated, Diffuse, Small Noncleaved-Cell Lymphomas, Lymphoma, Diffuse, Mixed Lymphocytic-Histiocytic, Lymphoma, Mixed Lymphocytic Histiocytic, High-Grade Lymphoma, Lymphoma, Diffuse Mixed-Cell, Lymphoma, Small Non-Cleaved-Cell, Diffuse Small Cleaved-Cell Lymphoma, Mixed Cell Lymphoma, Diffuse, Lymphoma, Small Noncleaved Cell, Lymphoma, Non-Hodgkins, Lymphoma, Low-Grade, Lymphoma, Nonhodgkins, Low-Grade Lymphomas, Reticulosarcomas, Noncleaved-Cell Lymphoma, Small, Lymphoma, Mixed-Cell, Undifferentiated Lymphoma, Diffuse, Reticulum Cell Sarcomas, Low-Grade Lymphoma, Sarcoma, Reticulum-Cell, Small Noncleaved-Cell Lymphoma, Intermediate-Grade Lymphoma, Diffuse Mixed Cell Lymphoma, Lymphoma, Non-Hodgkin, Lymphoma, Non Hodgkin, Lymphoma, Non Hodgkins, Mixed Lymphocytic-Histiocytic Lymphoma, Lymphoma, High Grade, Lymphoma, Atypical Diffuse Small Lymphoid, Lymphoma, High-Grade, Lymphoma, Diffuse, Lymphoma, Small Cleaved-Cell, Diffuse, Diffuse Undifferentiated Lymphomas, Mixed Lymphocytic-Histiocytic Lymphomas, Mixed-Cell Lymphoma, Diffuse, Non-Cleaved-Cell Lymphoma, Small, Sarcoma, Lymphatic, Mixed Lymphoma, Lymphosarcomas, Diffuse Small Cleaved Cell Lymphoma, Lymphoma, Nonhodgkin's, Lymphoma, Small Noncleaved-Cell, Small Non Cleaved Cell Lymphoma, Non-Hodgkin's Lymphoma, Nonhodgkins Lymphoma, Reticulum-Cell Sarcomas, Diffuse Lymphoma, Lymphoma, Intermediate Grade, Lymphoma, Mixed Cell, Diffuse, Lymphoma, Undifferentiated, Lymphocytic-Histiocytic Lymphoma, Mixed, Diffuse Undifferentiated Lymphoma, Sarcoma, Reticulum Cell, Lymphoma, Small and Large Cleaved-Cell, Diffuse, Lymphatic Sarcoma, Lymphoma, Non-Hodgkin's, Small Noncleaved Cell Lymphoma, Lymphoma, Mixed, Lymphosarcoma, Reticulum-Cell Sarcoma, Lymphoma, Intermediate-Grade, Intermediate-Grade Lymphomas, Lymphoma, Non-Hodgkin, Familial, Non-Hodgkins Lymphoma, Lymphoma, Small Non Cleaved Cell, Mixed Small and Large Cell Lymphoma, Diffuse, Small Cleaved Cell Lymphoma, Diffuse, Non Hodgkin Lymphoma, Small Non-Cleaved-Cell Lymphoma, Lymphocytic-Histiocytic Lymphomas, Mixed