Fig. 2

Cytological cyclin D1 immunostaining of thyroid neoplasms. a Cytological features of adenomatous goiter and papillary thyroid carcinoma using cyclin D1 immunostaining and Papanicolaou stain. Note absence of cyclin D1 immunostaining in adenomatous goiter and positive nuclear staining for cyclin D1 in papillary thyroid carcinoma. b Cytology of cyclin D1 immunolabeling with different types of thyroid neoplasms (n = 31). c There is correlation between cyclin D1- nuclear expression and tumor malignancy in thyroid neoplasm cells