A thyroid adenoma is a benign thyroid tumor. Also known as a solitary thyroid nodule, the typical single node separates it from a multinodal goiter.

Thyroid adenomas may present no clinical symptoms, but if instead they do, symptomatic hyperthyroidism may result.

Thyroid adenoma is different than many other thyroid tumors which are in fact cancerous (malignant). Thyroid cancers include:

Anaplastic cancer

Follicular cancer

Lymphoma

Medullary cancer

Papillary cancer