Table 1 Benign and Malignant causes of thyroid nodules
From: RETRACTED ARTICLE: Thyroid nodules update in diagnosis and management
| Benign | |
| Colloid nodule | |
| Hashimoto thyroiditis | |
| Simple or hemorrhagic cyst | |
| Follicular adenoma | |
| Subacute thyroiditis | |
| Malignant | |
| Primary | |
| Follicular cell-derived carcinoma: | |
| PTC, follicular thyroid carcinoma, anaplastic thyroid carcinoma | |
| C-cell–derived carcinoma: | |
| MTC | |
| Thyroid lymphoma | |
| Secondary | |
| Metastatic carcinoma (3 most common primaries are renal, lung & head-neck) |