[A neoplasm composed of a lymphocytic cell population which is usually malignant (clonal) by molecular genetic and/or immunophenotypic analysis. Lymphocytic neoplasms include Hodgkin's and Non-Hodgkin's lymphomas, acute and chronic lymphocytic leukemias, and plasma cell neoplasms. - 2003 ( NCI )]
UMLS (NCI) C0598798