This document discusses the classification and characteristics of mature lymphoid neoplasms. It covers several types of B-cell and T-cell/NK-cell neoplasms as well as Hodgkin's lymphoma. Chronic lymphocytic leukemia is described in more detail, including that it involves the accumulation of B lymphocytes in the blood, bone marrow, lymph nodes and spleen. Diagnosis involves blood tests and bone marrow aspiration showing lymphocytic dominance. Hodgkin's lymphoma is characterized by the presence of Reed-Sternberg cells in lymph node biopsies and generally has a high survival rate when detected early.