鉴于某些甲状腺微小癌将发展为进展性癌,所以在组织学上对微小癌进行分类,以识别何种类型的微小癌将发展为进展性癌。本文报道157例甲状腺微小癌的病理组织学改变,强调微小癌大小与组织学分型及其发展的关系。微小癌系指甲状腺内单灶性增生直径≤10mm 的癌灶。在3,218例外科切除的甲状腺标本中有626例甲状腺癌(19%),其中157例诊断为微小癌,男女之比为137∶20。微小癌与良性甲状腺疾病同时并存者占5%。组织学上,124例微小癌有高度包膜的包膜外 Since certain thyroid microcarcinomas will develop progressive cancers, they are histologically classified to identify what type of microcarcinoma will develop as progressive cancer. This paper reports the histopathological changes of 157 cases of thyroid microcarcinoma, and emphasizes the relationship between the size of microcarcinoma and histological type and its development. Microcarcinoma refers to a foci with a diameter of ≤10mm in the thyroid gland. Of the 3,218 surgically resected thyroid specimens, 626 were thyroid cancers (19%), of which 157 were diagnosed as microcarcinomas, and the ratio between males and females was 137:20. Microcancer and benign thyroid disease coexist at 5%. Histologically, 124 cases of microcarcinoma with highly enveloped envelope