乳头状癌是高分化甲状腺癌最为常见的一种 ,滤泡型乳头状癌 (ＦＶＰＴＣ)是乳头状癌中最常见的一个亚型 ,以滤泡的生长方式作为乳头状癌的核特征 ,可局灶或多灶出现 ,并不一定为弥漫分布 ,因而有可能误诊为良性滤泡结节。有报道认为细胞角蛋白 ,尤其是ＣＫ19有助于鉴别良性或恶 Papillary carcinoma is the most common type of well-differentiated thyroid carcinoma. Follicular papillary carcinoma (FVPTC) is the most common subtype of papillary carcinoma. The follicular growth pattern is used as the nuclear feature of papillary carcinoma. Focal or multiple lesions do not necessarily appear to be diffusely distributed and may be misdiagnosed as benign follicular nodules. It has been reported that cytokeratin, especially CK19, is helpful in the identification of benign or malignant