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) | |