非何杰金淋巴瘤是一种恶性肿瘤,近几十年来在世界各国的发病率显著增高。美国自70年代初期开始,该肿瘤的发生率几乎增加60％,年增长率约为3％～4％,是增长速度最快的癌症之一。组织病理学知识和诊断技术的重大进展以及记录数据和人口老龄化的改善仅能部分 Non-Hodgkin lymphoma is a malignant tumor, the incidence of which has been significantly increased in various countries in the world in recent decades. The United States since the early 1970s, the incidence of the tumor increased by almost 60%, the annual growth rate of about 3% to 4%, is one of the fastest growing cancer. Significant advances in histopathological knowledge and diagnostic techniques as well as improvements in recording data and population aging can only be partially