| Benign | | Multinodular (sporadic) goiter ("colloid adenoma") | | Hashimoto's (chronic lymphocytic) thyroiditis | | Cysts: colloid, simple, or hemorrhagic | | Follicular adenomas | | Macrofollicular adenomas | | Microfollicular or cellular adenomas | | Hürthle cell (oxyphil cell) adenomas | | Macro- or microfollicular patterns | | | Malignant | | Papillary carcinoma | | Follicular carcinoma | | Minimally or widely invasive | | Oxyphilic (Hürthle cell) type | | Medullary carcinoma | | Anaplastic carcinoma | | Primary thyroid lymphoma | | Metastatic carcinoma (breast, renal cell, others) | |
