malignant lymphoma in which neoplastic cells diffusely infiltrate the entire lymph node without any definite organized pattern; patients whose lymphomas present a diffuse pattern generally have a more unfavorable survival outlook than those presenting with a follicular or nodular pattern.
An obsolete term for a malignant tumor of lymphatic tissue.
A lymphoblastic lymphoma composed of immature small to medium-sized lymphoid cells (lymphoblasts). It includes the precursor B- and T-cell lymphoblastic lymphoma.
A non-Hodgkin lymphoma composed of monomorphic small, round B-lymphocytes in the lymph nodes. When the lymphoid process predominantly involves the bone marrow and the peripheral blood it is called chronic lymphocytic leukemia. (WHO, 2001)