摘要: The indolent B-cell lymphomas account for about one third of all in the Western world. follicular are largest and most easily recognized category lymphoma, representing quarter world.1, 2, 3 incidence lymphoma is markedly lower Asia than West, unclear reasons.4 Other well-defined (and their approximate percentage incidence) are: small lymphocytic (6%); nodal marginal zone (1–2%); extranodal mucosa-associated lymphoid tissue, or MALT (5–7%); splenic variant with villous lymphocytes (< 1%); lymphoplasmacytic (1%).