2023 Volume 62 Issue 2 Pages 122-125
Anaplastic thyroid carcinoma usually progresses from well-differentiated thyroid carcinoma, namely papillary carcinoma and follicular carcinoma. Abrupt transition of these 2 different histological components can be seen on histological examination. We can sometimes observe anaplastic transformation of well-differentiated thyroid carcinoma on histology slides. However, it is quite rare for these different components to appear on the same cytology slide. In this case reported herein, the papillary carcinoma and anaplastic carcinoma components appeared on the same cytology slide. Then, we estimated that the cytology findings suggested papillary thyroid carcinoma with anaplastic transformation.
