Table 1. The 2022 WHO classification of follicular cell derived thyroid neoplasm.
| 1. Benign tumors | |
| Thyroid follicular nodular disease | |
| Follicular adenoma | |
| Follicular adenoma with papillary architecture | |
| Oncocytic adenoma of the thyroid | |
| 2. Low-risk neoplasms | |
| Noninvasive follicular thyroid neoplasm with papillary-like nuclear features | |
| Thyroid tumors of uncertain malignant potential | |
| Hyalinizing trabecular tumor | |
| 3. Malignant neoplasms | Outcome |
| Follicular thyroid carcinoma | Favorable |
| Invasive encapsulated follicular variant papillary carcinoma | |
| Papillary thyroid carcinoma | |
| Oncocytic carcinoma of the thyroid | |
| Follicular-derived carcinomas, high-grade Differentiated high-grade thyroid carcinoma (necrosis and mitosis) Poorly differentiated thyroid carcinoma (Turin criteria) |
Intermediate |
| Anaplastic follicular cell–derived thyroid carcinoma | Poor |
Note:
Adapted from: (WHO, 2022; Tamhane & Gharib, 2016).