导言本分类主要根据肿瘤显微镜下的特征而进行的,因此它涉及到形态学上用一般光学显微镜所能分辨出来的细胞学类型和组织学结构。传统上的名词一般均被保留。列出同义词的,仅限于那些一直被广泛应用者;或那些被认为对于了解该疾病有重要意义者。在这些病例中,较好的名称放在前面,同义词则放在其下的括弧内。 INTRODUCTION This classification is based primarily on the characteristics of a tumor microscope and therefore it relates to the cytological and histological structures that can be distinguished morphologically using general light microscopy. Traditionally nouns are generally reserved. The list of synonyms is limited to those who have been widely used; or those who are considered to be important for understanding the disease. In these cases, better names are placed first, and synonyms are placed in parentheses below them.