Definition Follicular lymphoma (FL) is defined in fourth edition of the WHO Classification of Tumours of Haematopoietic and Lymphoid Tissues as a neoplasm composed of follicle center (germinal center) B cells (typically both centrocytes and centroblasts) that usually has at…
Definition of Disease Lymphoplasmacytic lymphoma (LPL) is defined in the WHO Classification of Tumours of Haematopoetic and Lymphoid Tissues, fourth edition, as a small B-cell neoplasm composed of lymphocytes, plasma cells, and plasmacytoid lymphocytes, which does not meet criteria for…
Historical Background The classification of lymphoid neoplasms used in this text is the one published by the World Health Organization (WHO) in WHO Classification of Tumours of Haematopoietic and Lymphoid Tissues . Initially published in 2008, the WHO's fourth edition…
Lymphoid tissues are the sites where precursor cells mature into immunocompetent lymphoid cells and where immune reactions to antigens occur. The lymphoid tissues and the stages of lymphocyte differentiation and maturation have an anatomy—they occur at specific sites in the…